31. | A train pulled by two locomotives is called a double header. |
| 由两台机车牵引的火叫双头列车。
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32. | He was bent double beneath his load. |
| 他被重负压弯了腰。
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33. | The book has a double purpose. |
| 这本书有双重目的。
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34. | Thalami serve the double [dual, twofold] purpose of seats by day and beds by night. |
| 日本人家里铺在地板上的草席有双重作用:白天作座席,夜间作床。
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35. | We've checked it and double checked it and we still can't find anything wrong. |
| 我们对它进行了检查,接着又检查了一遍,仍未发现任何问题。
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36. | There was a double knock at the door. |
| 有人在门上连敲两下。
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37. | He got quite a lot of money but she got double . |
| 他得了许多钱,但她所得是他的两倍。
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38. | Have you ever met your double ? |
| 你遇到过和你相像的人吗?
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39. | I paid only £2 for this old book and Mr Smith offered me double for it. |
| 我仅花两英镑买了这本旧书,史密斯先生愿出双倍价钱向我购买。
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40. | He took double of what the other children did. |
| 他所拿的是其他小孩的两倍。
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