21. | The clock struck twelve . |
| 钟敲12点。
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22. | Can you count to twelve in English? |
| 你能用英语数到12吗?
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23. | Oculists find that a child's eyes do not reach full development until about twelve years of age. |
| 眼科专家发现儿童的眼睛要到大约12岁才发育完全。
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24. | We have twelve departments in our college. |
| 我们学院有12个系。
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25. | Let it remain in salt during twelve hours. |
| 把它用盐腌12小时。
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26. | An orange separates ( up ) into ten or twelve pieces. |
| 一个橘子可分成10瓣或12瓣。
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27. | The ship was snoring along in a good twelve knot breeze. |
| 船在时速12海里的轻风中轰隆轰隆地驶进。
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28. | The installments were spread over twelve months. |
| 分期付款在12个月内付清。
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29. | I will pay you twelve dollars a week to start with. |
| 开始时我将每周付你12美元。
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30. | The ship steamed at twelve knots. |
| 轮船以12海里的时速行驶。
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