activation
gb/ˌæktɪvˈeɪʃən/ us/ˌæktɪvˈeɪʃən/
B2
英语
~ 6000
义项
0 个义项
名词
B2
action
1
starting a device or service
The process of making a phone, card, or online account ready so you can use it.
用法模式：
the activation of [a device/service/account/card]
常见错误：
Learners sometimes say *"open my account"* when they mean *"activate my account"*. "Open" is used when the bank first creates the account; "activate" is used when you make a card, phone, or service start working. Another mistake is using a verb form *"I will activation my card"*; the correct verb is *"activate"*.
近义词
enabling (A general word for making something able to work, not only for devices or services.)
反义词
deactivation (Refers to turning off or disabling a device, account, or service so it cannot be used.)
搭配
activation code
|activation key
|activation email
|activation link
|activation fee
|account activation
主题
technology
|business
|daily life
|daily_life
例句
- You will receive an activation code by text message to complete your account activation.
- The SIM card requires activation before you can make calls.
- There was a problem with the activation of my new credit card.
- After software activation, all premium features became available.
- The activation fee will be added to your first monthly bill.
学习者例句
- I am waiting for the activation of my new bank card.
- Click this link to finish the activation of your account.
- Phone activation usually takes a few minutes.
- The store helped me with the activation of my internet service.
unknown
B2
action
2
starting a plan or system
The act of making a plan, rule, or program start and really work.
用法模式：
the activation of [a plan/program/system/rule]
常见错误：
Learners sometimes use *"start"* where a more formal context needs *"activation"*, for example *"the start of the emergency plan"* instead of *"the activation of the emergency plan"*. "Start" is fine in casual speech, but "activation" is preferred in official or written contexts for systems, rules, and protocols.
近义词
implementation (Focuses more on carrying out a plan over time, not just the moment when it is officially started.)
反义词
suspension (Refers to officially stopping or pausing a plan, rule, or system that was active.)
搭配
activation of the emergency plan
|activation of sanctions
|protocol activation
|alarm activation
|system activation
|clause activation
主题
work
|government
|organization
|business
|law
例句
- The activation of the emergency plan was ordered after the flood warnings were raised.
- Automatic activation of the alarm occurs if the temperature rises above a set limit.
- The contract includes an activation clause that triggers extra payments after a year.
- The city announced the activation of its heat-response protocol.
- Delays in activation of the new system caused confusion among staff.
学习者例句
- The activation of the new rules starts next month.
- There was a problem with the activation of the fire alarm system.
- The manager approved the activation of the training program.
- Activation of the security protocol is automatic during an attack.
名词
technical
C1
event
3
making cells or molecules active
In science, the process when a cell, enzyme, or part of the brain becomes active and starts working.
用法模式：
the activation of [a cell/enzyme/receptor/brain region]
常见错误：
Learners may confuse "activation" with "activity". "Activation" is the process of becoming active; "activity" is the ongoing action or level of work. For example, *"enzyme activation"* (the start of work) vs. *"enzyme activity"* (how strongly it works).
近义词
stimulation (Often refers to causing activity, but is less specific; "activation" usually describes the exact process of becoming active in a system.)
反义词
inhibition (Refers to preventing or reducing the activity of a cell, enzyme, or pathway, which is the functional opposite of activation.)
搭配
enzyme activation
|immune cell activation
|receptor activation
|T-cell activation
|brain activation
|pathway activation
主题
science
|medicine
|health
例句
- The drug increases activation of specific receptors in the brain.
- T-cell activation is a key step in the body’s immune response.
- The scan showed strong activation in the visual cortex during the task.
- Calcium ions play a crucial role in enzyme activation.
- Researchers measured neural activation while participants watched the video.
学习者例句
- The medicine changes the activation of cells in the body.
- Brain activation is higher when a person is afraid.
- This signal causes the activation of the enzyme.
- Scientists study the activation of the immune system.
名词
technical
C1
entity
4
output of a neural network unit
In machine learning, the number that a neuron in a network sends out after a special function changes its input.
用法模式：
the activation of [a neuron/unit/layer]
常见错误：
Learners sometimes mix up "activation" and "activation function". The activation function is the formula (like ReLU or sigmoid); the activation is the result after applying that formula.
近义词
output (A general word for what comes out of a system; "activation" is a specific kind of output in neural networks.)
反义词
suppression (Refers to forcing activations to be reduced or set to zero, effectively the opposite of producing a strong activation.)
搭配
neuron activation
|activation function
|hidden layer activations
|ReLU activation
|activation map
|unit activation
主题
technology
|science
|computing
例句
- We visualized the activation of each layer to understand what the network was learning.
- The neuron’s activation is clipped at zero by the ReLU function.
- Batch normalization changes the distribution of activations during training.
- Sparse activation helps the model focus on the most relevant features.
- High activation in this filter suggests it is detecting vertical edges.
学习者例句
- Each neuron in the network has an activation.
- We save the activations from the last layer for analysis.
- The activation becomes zero when the input is negative.
- Different inputs produce different activation patterns.
名词
technical
C1
action
5
putting troops into active service
In the military, the official act of making soldiers or units start active work or be ready to fight.
用法模式：
the activation of [troops/units/reserves]
常见错误：
Learners may confuse "activation" with "training". Training is preparation; activation is the formal start of active service or readiness.
近义词
deployment (Deployment usually means sending forces to a location, while activation means placing them into active status or readiness.)
反义词
demobilization (Refers to taking troops out of active service, the opposite of activation in a military setting.)
搭配
activation order
|activation of reserves
|unit activation
|brigade activation
|activation ceremony
主题
military
|government
|politics
|law
例句
- The government authorized the activation of 5,000 reservists.
- Activation of the unit was completed within 48 hours.
- The activation order came late at night after the attack.
- Following activation, the brigade moved to its designated positions.
- The ceremony marked the activation of the new headquarters.
学习者例句
- The army announced the activation of reserve forces.
- After activation, the soldiers were ready to move.
- The president signed the activation order yesterday.
- Activation of the unit was reported on the news.
名词
technical
C2
event
6
making material radioactive by irradiation
In nuclear science, the process when something becomes radioactive because it is hit by radiation.
用法模式：
the activation of [a material/sample/element]
常见错误：
Learners may think "activation" here just means "turning something on" in a general sense, but in nuclear physics it has the specific meaning of making a material radioactive.
近义词
irradiation (Irradiation is the act of exposing something to radiation; activation refers specifically to the resulting change into a radioactive state.)
反义词
decay (Radioactive decay is the natural loss of radioactivity over time, which moves a material away from the activated state.)
搭配
neutron activation
|activation analysis
|activation product
|activation cross-section
主题
science
|energy
例句
- Neutron activation of the sample allowed researchers to measure trace elements.
- Activation products must be stored safely for many years.
- The team calculated activation levels for materials inside the reactor.
- Uncontrolled activation can increase long-term radioactive waste.
- Activation analysis was used to determine the composition of the alloy.
学习者例句
- Activation can make a material dangerous for a long time.
- Neutron activation happens inside a nuclear reactor.
- Scientists study activation to understand how safe a material is.
- Activation products must be handled with care.
语法
词典原形
activation
IPA
GB/ˌæktɪvˈeɪʃən/
US/ˌæktɪvˈeɪʃən/
音节与重音
ac - tiv - a - tion （4 个音节）
Stress on 3rd syllable (a)
词形变化
Noun
- Base: activation
- Plural: activation, activations
词族
Forms
activations
noun
Negative and opposite forms
Advanced or less common
activator
noun
reactivate
verb
reactivation
noun
相关表达
activation barrier
1/ˌæktɪvˈeɪʃən bˈɛɹiɚ/
fixed phrase
technical
energy barrier before reaction starts
The energy wall that must be passed before a chemical or physical process can begin.
例句
- The catalyst lowers the activation barrier, making the process faster.
- A high activation barrier prevents the reaction from happening at low temperatures.
activation code
1/ˌæktɪvˈeɪʃən kˈoʊd/
fixed phrase
code used to activate something
A set of numbers or letters you must enter to make a phone, program, or account start working.
例句
- Enter the activation code sent to your phone to complete the sign-up.
- Without a valid activation code, the software will run in trial mode.
activation email
1/ˌæktɪvˈeɪʃən imˈeɪl/
fixed phrase
email to activate an account
An email that has a link or code you must use to make your new online account work.
例句
- Check your inbox for an activation email and click the link inside.
- If you don’t receive an activation email, please contact support.
activation energy
1/ˌæktɪvˈeɪʃən ˈɛnɚd͡ʒi/
fixed phrase
technical
minimum energy to start reaction
In chemistry, the smallest amount of energy needed to make a chemical reaction begin.
例句
- A catalyst lowers the activation energy of the reaction.
- Because the activation energy is high, the reaction is very slow at room temperature.
activation fee
1/ˌæktɪvˈeɪʃən fˈi/
fixed phrase
fee for starting a service
Money you pay one time to start using a phone, card, or other service.
例句
- There is a $25 activation fee for new customers.
- The company waived the activation fee during the promotion.
activation function
1/ˌæktɪvˈeɪʃən fˈʌŋkʃən/
fixed phrase
technical
neural network output function
In machine learning, the math rule that takes a neuron's input and turns it into its output value.
例句
- We switched the activation function from sigmoid to ReLU.
- Choosing the right activation function can improve model performance.
activation key
1/ˌæktɪvˈeɪʃən kˈi/
fixed phrase
software license code
A special code that lets you unlock and fully use a computer program.
例句
- You need to buy an activation key to remove the trial limits.
- After entering the activation key, all features were unlocked.
activation level
1/ˌæktɪvˈeɪʃən lˈɛvəl/
fixed phrase
technical
amount of activity in a system
How strong the activity is in something like the brain, a cell, or a machine at a certain time.
例句
- We observed higher activation levels in the amygdala under stress.
- The activation level of the sensor increases with temperature.
activation link
1/ˌæktɪvˈeɪʃən lˈɪŋk/
fixed phrase
link that activates an account
A web address in an email or message that you click to turn on your account or service.
例句
- Click the activation link to verify your email address.
- The activation link expired, so I had to request a new one.
activation lock
1/ˌæktɪvˈeɪʃən lˈɑk/
fixed phrase
device security lock feature
A security tool on phones and tablets that stops other people from using the device unless they know the owner’s account and password.
例句
- Make sure activation lock is turned on in your settings.
- Without the Apple ID, they couldn’t remove the activation lock.
activation process
1/ˌæktɪvˈeɪʃən pɹˈɑsˌɛs/
fixed phrase
steps needed to activate something
The set of actions you must follow to make a device, service, or account start working.
例句
- The activation process only takes a few minutes online.
- Our website explains the activation process step by step.