名词：concentration。concentrate，作动词时意思是“集中；浓缩；全神贯注；聚集”，作名词时意思是“浓缩，精选；浓缩液”。
v.集中(注意力); 聚精会神; 使…集中(或集合、聚集); (使)浓缩;
n.浓缩物;
[例句]He would do well to concentrate more on his work.
他最好还是更加集中精力在工作上。
第三人称单数：concentrates
现在分词：concentrating
过去式：concentrated
过去分词：concentrated
You must concentrate on your work. 你必须专心于你的工作。
You should concentrate on your study. 你应该专心于你的学习。
In doing so,businesses will be able to concentrate on what they know how do best: their business. 这样，事情将能够集中在他们知道如何做得最好的事情上：他们的业务。
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