atom
gb/ˈætəm/ us/ˈætəm/
B1
英语
~ 2500
义项
0 个义项
名词
technical
B1
entity
1
smallest unit of an element
The tiniest part of an element that still has the same properties as that element.
用法模式：
an atom of [element]
常见错误：
Learners sometimes confuse 'atom' with 'molecule'. An atom is a single particle of an element; a molecule is two or more atoms joined together.
近义词
particle (A more general term for a small piece of matter, not necessarily a chemical element.)
反义词
molecule (A molecule is made of two or more atoms bonded together, so it is larger and more complex.)
搭配
split an atom
|hydrogen atom
|carbon atom
|atomic structure
|atom model
主题
science
|chemistry
|physics
例句
- A water molecule is made up of two hydrogen atoms and one oxygen atom.
- Scientists can split an atom to release energy.
- Every atom of gold has the same number of protons.
学习者例句
- An atom is very small.
- This is an atom of oxygen.
- Atoms make up all things.
名词
B2
quantity
2
a very tiny amount
A very, very small amount of something.
用法模式：
not an atom of [something]
常见错误：
Learners may overuse this figuratively; it is more common in formal or literary contexts than in casual speech.
近义词
bit (A small amount, but less emphatic than 'atom'.)
反义词
lot (A large amount, opposite in quantity.)
搭配
not an atom of truth
|without an atom of doubt
主题
measurement
|figurative
|core_vocabulary
例句
- There isn’t an atom of truth in his story.
- She didn’t have an atom of doubt about his honesty.
- He showed not an atom of fear.
学习者例句
- There is not an atom of sugar in this tea.
- He has not an atom of doubt.
- She does not have an atom of fear.
语法
词典原形
atom
IPA
GB/ˈætəm/
US/ˈætəm/
音节与重音
atom （1 个音节）
Stress on 1st syllable (atom)
词形变化
Noun
- Base: atom
- Plural: atoms
词族
Forms
atoms
noun
Core family
atomic
adjective B2
Related words
atomize
verb
atomization
noun
Advanced or less common
subatomic
adjective
atomically
adverb
相关表达
not an atom of truth
1/nˈɑt ən ˈætəm əv tɹˈuθ/
fixed phrase
no truth at all
It means that something is completely false.
例句
- There is not an atom of truth in those rumors.
- His statement contained not an atom of truth.
split the atom
1/splˈɪt ðə ˈætəm/
fixed phrase
technical
break apart an atomic nucleus
To break the center of an atom to release energy.
例句
- Nuclear power plants do not literally split the atom in the same way as early experiments did.
- The discovery that you could split the atom changed history.