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BNC: 1564 COCA: 2752
concentrationnounuk/ˌkɒn.sənˈtreɪ.ʃən/ us/ˌkɑːn.sənˈtreɪ.ʃən/

concentration noun ATTENTION

B2 [ U ] the ability to think carefully about something you are doing and nothing else专注，专心

The noise outside made concentration difficult.外面吵得我难以集中注意力。
There was a look of intense concentration on her face.她脸上带着全神贯注的表情。
I find that yoga improves my powers of concentration.我发现练瑜伽提高了我的注意力。
It was hard to follow what the teacher was saying, and eventually I lost concentration.我发现自己难以理解老师在讲什么，最后就走神了。
The party's concentration on tax reduction has won them a lot of support.政府集中推行减税政策，从而赢得了广泛的拥护。

More examples

This is a very difficult piece of music to play - it demands a lot of concentration.

Heart surgery exacts tremendous skill and concentration.

The job demands a high level of concentration.

Hyperactive children often have poor concentration and require very little sleep.

Even a low level of noise interferes with my concentration.

concentration noun AMOUNT

C2 [ C or U ] a large number or amount of something in the same place集中；聚集；汇集

There is a heavy concentration of troops in the area.该地区有重兵驻扎。

[ C or U ] specialized chemistry the exact amount of one particular substance that is found in another substance浓度

a concentration of one part per million百万分之一的浓度
High concentrations of toxic elements were found in the polluted areas.在被污染地区发现了高浓度的有毒元素。

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