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71. | "I don't know. Can't say." |
| “我不知道,说不上来。” |
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72. | I wonder who she is. |
| 不知道她是谁﹖ |
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73. | He certainly doesn't know. |
| 他保管不知道。 |
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74. | Nobody knows nothin' about him. |
| 谁也不知道他。 |
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75. | He does not seem to know it . |
| 他似乎不知道。 |
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76. | Haven't a clue. |
| 一点儿也不知道。 |
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77. | Not sure what's for dinner? |
| 不知道晚饭吃什么? |
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78. | 'I don't know, I'm sure. |
| “呃,不知道,真的。 |
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79. | I'm afraid we can't do it. |
| 抱歉,我不知道。 |
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80. | be in the dark about |
| 完全不知道|蒙在鼓里 |
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