学习资料

[意       思]n. 集中
[例]  There is a concentration of people in big cities. 大城市人口集中。
n. 专心，专注
[例]  Concentration is essential if you want to do a good job. 如果你想把事情做好,专心是必要的。

更多意思

n.1.  专注, 专心
2.  关注，重视
3.  浓度,含量
4.  集中, 聚集

参考例句

1.	The drug affects one's power(s) of concentration .
	这种药影响人精神不能集中。
2.	The tennis players need total concentration during play.
	网球运动员在比赛中需要全神贯注。
3.	Stress and tiredness often result in a lack of concentration .
	紧张和疲劳常使人精神不集中。
4.	I found it hard to keep my concentration with such a noise going on.
	吵闹声不绝于耳,我很难保持精神集中。
5.	Chess is a game that calls into play all one's powers of concentration .
	下国际象棋要全神贯注才行。