51. | The sand and dirt in the water gravitated to the bottom of the bottle. |
| 水中的沙泥沉到底。
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52. | He knocked the bottom out of the box. |
| 他把箱底敲掉了。
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53. | Her refusal has knocked the bottom out of my plans. |
| 她的拒绝打破了我的计划。
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54. | The matter must be probed to the bottom . |
| 这件事必须彻底调查。
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55. | They were very disappointed when their son came out bottom in the examination. |
| 他们的儿子考了最末一名,他们大失所望。
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56. | Textbooks often have comments at the bottom of a page or the end of a chapter to explain a difficult part. |
| 教科书在一页的底端或一章的末尾常有关于难懂部分的注释。
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57. | The submarine made a dive toward the bottom . |
| 潜水艇向海底潜下去。
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58. | Children always dive to the bottom of a subject. |
| 孩子们对问题总是追根究底。
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59. | He bet his bottom dollar at the races and now he is broke. |
| 他把最后一块钱押在赛马上,现在已身无分文。
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60. | I bet my bottom dollar that he won't arrive this evening. |
| 我敢拿一切来打赌,他今晚一定到不了。
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