n. a concentrated form of a foodstuff; the bulk is reduced by removing water
n. a concentrated example of something
v. make denser, stronger, or purer
v. direct one's attention on something
n. 浓缩, 精选
v. 集中, 专心
1. I need to concentrate on my studies to pass the exam.
我需要专注于我的学习，以通过考试。
2. It is hard to concentrate with all the noise around me.
周围的噪音让我很难集中注意力。
3. She tries to concentrate when she is reading a book.
她在读书时努力集中注意力。