pearl harbour（concentrate的过去式和用法例句）

concentrate做动词有专心;集中;浓缩等意思，那么你知道concentrate的过去式是什么吗?下面找论文网小编为大家带来concentrate的过去式和用法例句，希望对大家的学习有所帮助!

　　concentrate的过去式和其他时态：

过去式: concentrated

过去分词: concentrated

现在分词: concentrating

　　concentrate的用法：

concentrate的用法1：concentrate的基本意思是指“吸引到或固定在一个中心之上”,既可指能被聚集、集中的事物,也可指缩聚于一点以增强其力量和强度的物质,强调人的技术、方法或努力程度，引申可指把注意力集中于…之上。

concentrate的用法2：concentrate作“集中”“聚集”解时,可用作不及物动词,也可用作及物动词。其后接at, in等介词,表示“集中在…”，后多接表示地点的名词。

concentrate的用法3：concentrate作“浓缩”解时,是及物动词,接名词或代词作宾语。

concentrate的用法4：concentrate作“专心于”解时,可用作不及物动词,也可用作及物动词,其宾语多为attention, mind, energies, efforts或thoughts等词,宾语后面接介词on,表示“把…集中在…之上”。

concentrate的用法5：有人认为,动词concentrate本身带有“集中精神”或“思想集中”的意思,因此后面不应再有mind, thoughts等一类的词。

　　concentrate的过去式例句：

1. The living organisms somehow concentrated the minerals by biological processes.

生命体通过某种生物过程聚集矿物质。

2. Mr Prescott concentrated on offering a classic restatement of Labour values.

普雷斯科特先生专注于对工党价值观进行经典的阐释。

3. Most development has been concentrated in and around cities.

土地开发主要集中在城市及周边地区。

4. Italy's industrial districts are concentrated in its north-central and north-eastern regions.

意大利的工业区集中在该国中北部和东北部地区。

5. In a brief statement, he concentrated entirely on international affairs.

他作了一个简短的声明，集中阐述了在国际事务方面的立场。

6. He made a concentrated effort to finish the work on time.

他全力以赴以按时完成这项工作。

7. He was calm and concentrated in judging how to defeat his opponent.

他冷静沉着,聚精会神地判断如何打败对手.

8. He concentrated his pupils and declared the exciting news.

他把他的学生集中在一起,宣布了这条令人兴奋的消息.

9. The liquid is found in a highly concentrated form.

人们发现这种液体呈高度浓缩状.

10. He concentrated his attention on the question of technology.

他将注意力全都贯注在技术问题上.

11. They concentrated on better definition of the optical image.

他们致力于提高该光学影像的清晰度.

12. She turned the nozzle and the spray concentrated down to a stream.

她掉转喷嘴,让水花集中喷入小河.

13. Most of our forces have concentrated at the bridge.

我们大部分兵力都已集结在桥那里.

14. Modern industry has been concentrated in a few urban centers.

现代工业全集中在几个市中心.

15. An enormously powerful fleet was concentrated at Pearl Harbour.

一支极其强大的舰队集结在珍珠港.

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