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11. | I can't concentrate on any studies. |
| 而且学习时思想不能集中。 |
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12. | He's tired and can't concentrate. |
| 他累了,注意力不能集中。 |
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13. | concentrate one's attention on a problem |
| 把注意力集中某问题 |
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14. | concentrate rays of light into a focus |
| 把光线集中在焦点上 |
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15. | he found it impossible to concentrate, |
| 他发现它不能集中, |
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-- 来源 -- 超越目标英语 第5册 - Unit 5 WHAT WOULD YOU DO? |
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16. | Most of industry-districts concentrate in northeast. |
| 工业区大部分集中在东北 |
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17. | Tom finds it difficult to concentrate. |
| 汤姆发现很难集中注意力。 |
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18. | It 's too hot to concentrate on book. |
| 热得不能集中心思看书。 |
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19. | These groups concentrate in the inner cities. |
| 这些人集中在内地城市。 |
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20. | used to concentrate light on an object. |
| 用来在物体上集中光线。 |
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