concentrate短语搭配

concentrate (sth) (on sth/on doing sth)；

concentratev.集中(注意力)；聚精会神；使…集中(或集合、聚集)；(使)浓缩

It is difficult to make oneself concentrate for long periods.

让自己长时间聚精会神是很困难的。

Power is largely concentrated in the hands of a small elite.

权力主要集中在少数精英人物的手里。

Nothing concentrates the mind better than the knowledge that you could die tomorrow.

没有什么比知道自己明天就可能会死去更能让人定下心来去思考种种问题的了。