concentrate

过去分词：

动词过去分词: concentrated

更多词形：

形容词: concentrative | 副词: concentratively | 名词: concentrator | 动词过去式: concentrated | 动词过去分词: concentrated | 动词现在分词: concentrating | 动词第三人称单数: concentrates |

单词例句：

A racking headache made him unable to concentrate on his study.

折磨人的头痛使他不能全神贯注地学习。

A convex lens is used to concentrate rays of light.

凸透镜用于聚集光线。

Concentrate your order with us save you money on postage, cable, freight, documentation, etc.

如集中向我公司采购，能节省您在邮递、电报、运输以及提供单证等方面的各项费用。

Be quiet - let me concentrate on my homework.

请安静,让我集中精力完成作业。

I can't concentrate on my work when I'm tired.

我累了就无法集中精力工作。

Having failed my French exams, I decided to concentrate on science subjects.

我因法语考试不及格而决心专攻理科。

He's tired and can't concentrate.

他累了，注意力不能集中。

Don' t put me off when I' m trying to concentrate.

我正要集中注意力呢, 别打搅我.

She felt ill. She went to work, however, and tried to concentrate.

她病了。然而她照旧去上班，并且尽力集中精神工作。