concentration

1.[u]专心；专注the ability to direct all your effort and attention on one thing, without thinking of other things

2.[u]~ (on sth)关注；重视the process of people directing effort and attention on a particular thing

3.[c]~ (of sth)集中；聚集a lot of sth in one place

4.[c][u]浓度；含量the amount of a substance in a liquid or in another substance

1.【化】提浓,蒸浓,浓缩;浓度;稠密度;【矿】汰选,选矿,富化

2.集中

3.集中注意,专心

1.the process of giving all your attention to something

2.a large number of people or things in one area or a large amount of a particular thing

3.the amount of a substance that is present in something

4.a major at a college or university