concentration
gb/kˌɔnsəntɹˈeɪʃən/ us/kˌɔnsəntɹˈeɪʃən/
B1
英語
~ 1600
語義
0件の語義
名詞
B1
state
1
focused mental attention
When you think very carefully about one thing and ignore other things.
用法パターン：
[someone]'s concentration on [something]
よくある間違い：
Learners sometimes confuse 'concentration' with 'concertation' or mistakenly use it to mean 'gathering of people'.
類義語
focus (More common in everyday speech; slightly broader meaning.)
対義語
distraction (Refers to something that takes attention away, opposite of concentrating.)
コロケーション
lose concentration
|maintain concentration
|require concentration
|high level of concentration
テーマ
learning
|work
|psychology
|education
|core_vocabulary
例文
- Her concentration was broken by the loud noise outside.
- You need a lot of concentration to solve this puzzle.
- He maintained his concentration throughout the entire exam.
- The job requires intense concentration for long periods.
- Meditation helps improve your concentration.
学習者向け例文
- I need concentration to read this book.
- The noise makes my concentration bad.
- He has good concentration in class.
- This game needs much concentration.
名詞
B2
state
2
dense grouping or collection
Many things or people in one small area.
用法パターン：
a concentration of [things/people] in [place]
よくある間違い：
Learners may confuse this with 'focus' meaning, but here it refers to physical grouping, not mental attention.
類義語
cluster (Usually smaller or more irregular grouping.)
対義語
dispersion (Refers to the spreading out over a larger area.)
コロケーション
high concentration
|population concentration
|concentration area
テーマ
geography
|sociology
|space
|core_vocabulary
例文
- There is a high concentration of tech companies in Silicon Valley.
- The report shows a concentration of wealth in a small group of families.
- The highest concentration of pollution was found near the factory.
- Wildlife conservationists noted a concentration of rare birds in the region.
学習者向け例文
- There is a big concentration of shops here.
- The city has a high concentration of people.
- We saw a concentration of fish near the rocks.
名詞
technical
B2
quantity
3
amount of substance per volume
How much of something is in a certain space or liquid.
用法パターン：
the concentration of [substance] in [medium]
よくある間違い：
Learners may confuse this with 'strength' in non-scientific contexts, but here it is a precise measurement.
類義語
density (In science, density is related but refers to mass per volume, not proportion of substance.)
対義語
dilution (Process or state of making something less concentrated.)
コロケーション
high concentration
|low concentration
|concentration level
テーマ
science
|chemistry
|core_vocabulary
例文
- The salt concentration in seawater is about 3.5%.
- Scientists measured the concentration of carbon dioxide in the atmosphere.
- This medication has a high concentration of active ingredients.
学習者向け例文
- The water has a high salt concentration.
- We test the sugar concentration in juice.
- The air has low oxygen concentration.
文法
辞書形
concentration
IPA
GB/kˌɔnsəntɹˈeɪʃən/
US/kˌɔnsəntɹˈeɪʃən/
音節・強勢
con - cen - tra - tion （4音節）
Stress on 3rd syllable (tra)
活用形
Noun
- Base: concentration
- Plural: concentration, concentrations
関連語
Forms
concentrations
noun
Core family
concentrate
verb A2
concentrated
adjective B2
表現
break someone's concentration
1/bɹˈeɪk sˈʌmwˌʌnz kˌɔnsəntɹˈeɪʃən/
fixed phrase
interrupt focused attention
To make someone stop focusing on what they are doing.
例文
- The noise from outside broke my concentration.
- Don't break her concentration while she's studying.
lose concentration
1/lˈuz kˌɔnsəntɹˈeɪʃən/
fixed phrase
stop focusing attention
To stop thinking carefully about something you are doing.
例文
- She lost concentration after her phone rang.
- If you lose concentration while driving, it can be dangerous.
maintain concentration
1/meɪntˈeɪn kˌɔnsəntɹˈeɪʃən/
fixed phrase
keep focusing attention
To continue thinking carefully about something without being distracted.
例文
- It's difficult to maintain concentration during long meetings.
- Athletes train to maintain concentration under pressure.