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| 21. | "Helium: Chemical element, chemical symbol He, atomic number 2." |
| 氦:化学元素,化学符号He,原子序数2。 |
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| 22. | low flow interceptor |
| 旱季污水截流渠；低流量污水截流渠 |
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| 23. | To allure him to drink |
| 诱渠饮酒 |
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| 24. | gully cleansing |
| 清渠服务 |
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| 25. | To dig a ditch. |
| 开沟，筑渠 |
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| 26. | lock approach channel |
| 船闸引渠 |
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| 27. | aeration channel |
| 曝气渠 |
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| 28. | canalization project |
| 渠化工程 |
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| 29. | drainage reserve |
| 渠务保留地 |
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| 30. | concrete nullah |
| 混凝土防洪渠 |
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