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| 41. | The smell of the drain is enough to make one throw up. |
| 那条下水道的气味足以令人呕吐。 |
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| 42. | On upper floors， plugged drains may cause flooding. |
| 楼上堵塞的下水道也许会引起淹水。 |
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| 43. | A backup in the sink;a backup of traffic at the drawbridge. |
| 下水道堵塞；吊桥上的交通阻塞 |
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| 44. | Once a year they have to flush the city's sewers. |
| 每年,他们都得冲洗一次城市下水道。 |
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| 45. | what is drained off;sewage |
| 排出的污水;下水道的污物. |
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| 46. | Grease has fouled this drain. |
| 油污使这条下水道壅塞了。 |
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| 47. | 1.to go down; to descend 2.to go on (used after a verb)3.to get; to grow; to become (used after an adjective) |
| 下去 |
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| 48. | the arm of the record player; an arm of the sea; a branch of the sewer. |
| 电唱机的把手；海湾；下水道的分支。 |
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| 49. | plunge a rod into a blockeddrain to clear it |
| 用棍通下水道使之畅通. |
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| 50. | American and Chinese engineers installed drainage culverts. |
| 美国和中国的工程兵安装下水道。 |
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