concentrate的過去式和用法例句
concentrate做動詞有專心;集中;濃縮等意思，那麼你知道concentrate的過去式是什麼嗎?下面本站小編爲大家帶來concentrate的過去式和用法例句，希望對大家的學習有所幫助!
concentrate的過去式和其他時態：
過去式: concentrated
過去分詞: concentrated
現在分詞: concentrating
concentrate的用法：
concentrate的用法1：concentrate的基本意思是指“吸引到或固定在一箇中心之上”,既可指能被聚集、集中的事物,也可指縮聚於一點以增強其力量和強度的物質,強調人的技術、方法或努力程度，引申可指把注意力集中於…之上。
concentrate的用法2：concentrate作“集中”“聚集”解時,可用作不及物動詞,也可用作及物動詞。其後接at, in等介詞,表示“集中在…”，後多接表示地點的名詞。
concentrate的用法3：concentrate作“濃縮”解時,是及物動詞,接名詞或代詞作賓語。
concentrate的用法4：concentrate作“專心於”解時,可用作不及物動詞,也可用作及物動詞,其賓語多爲attention, mind, energies, efforts或thoughts等詞,賓語後面接介詞on,表示“把…集中在…之上”。
concentrate的用法5：有人認爲,動詞concentrate本身帶有“集中精神”或“思想集中”的意思,因此後面不應再有mind, thoughts等一類的詞。
concentrate的過去式例句：
1. The living organisms somehow concentrated the minerals by biological processes.
生命體通過某種生物過程聚集礦物質。
2. Mr Prescott concentrated on offering a classic restatement of Labour values.
普雷斯科特先生專注於對工黨價值觀進行經典的闡釋。
3. Most development has been concentrated in and around cities.
土地開發主要集中在城市及周邊地區。
4. Italy's industrial districts are concentrated in its north-central and north-eastern regions.
意大利的工業區集中在該國中北部和東北部地區。
5. In a brief statement, he concentrated entirely on international affairs.
他作了一個簡短的聲明，集中闡述了在國際事務方面的立場。
6. He made a concentrated effort to finish the work on time.
他全力以赴以按時完成這項工作。
7. He was calm and concentrated in judging how to defeat his opponent.
他冷靜沉着,聚精會神地判斷如何打敗對手.
8. He concentrated his pupils and declared the exciting news.
他把他的學生集中在一起,宣佈了這條令人興奮的消息.
9. The liquid is found in a highly concentrated form.
人們發現這種液體呈高度濃縮狀.
10. He concentrated his attention on the question of technology.
他將注意力全都貫注在技術問題上.
11. They concentrated on better definition of the optical image.
他們致力於提高該光學影像的清晰度.
12. She turned the nozzle and the spray concentrated down to a stream.
她掉轉噴嘴,讓水花集中噴入小河.
13. Most of our forces have concentrated at the bridge.
我們大部分兵力都已集結在橋那裏.
14. Modern industry has been concentrated in a few urban centers.
現代工業全集中在幾個市中心.
15. An enormously powerful fleet was concentrated at Pearl Harbour.
一支極其強大的艦隊集結在珍珠港.
