21. | You should exercise extreme caution when driving in fog. |
| 在雾中开车要极为小心。
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22. | The teacher wrote the sums on the board, and the children copied them down in their exercise books. |
| 老师把算术题写在黑板上,学生再抄写在自己的练习本上。
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23. | You ought to diet and take more exercise . |
| 你应该节食并多做运动。
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24. | He's getting fat and flabby because he doesn't have enough exercise . |
| 他因为缺少锻炼而日见肥胖肌肉松弛。
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25. | Exercise will firm up your muscles. |
| 锻炼身体能使肌肉结实。
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26. | Exercise is good for the health. |
| 锻炼身体有益于健康。
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27. | I take the odd bit of exercise , but nothing regular. |
| 我偶尔稍微锻炼一下,但无规律。
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28. | A stroll round the garden hardly qualifies as exercise ! |
| 在花园转转算不上锻炼!
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29. | Exercise tones up the muscles. |
| 运动能使肌肉结实。
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30. | She jotted down a few notes, and later transcribed them into an exercise book. |
| 她草草做了些笔记,然后誊写在练习本上。
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