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| 21. | Sediment begins to choke the channel's opening. |
| 沉积物开始淤塞河道口。 |
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| 22. | The ditch filled up with mud. |
| 沟渠为泥所淤塞。 |
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| 23. | canalized rivers |
| 渠化河流;渠化河段 |
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| 24. | The canal would soon fill up with mud if not regularly dredged. |
| 这条运河如果不经常疏浚，就会淤塞。 |
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| 25. | The southern part of the canal is still open to navigation nowadays. |
| 如今，南方河段仍可通航。 |
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| 26. | The Suez Canal would soon fill up with mud if not regularly dredged |
| 苏伊士运河如果不定期疏浚，很快就会淤塞。 |
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| 27. | An instance of clogging or obstructing. |
| 阻塞堵塞或淤塞的实例 |
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| 28. | In the upper reach the bed was dune covered and in the lower reach it was flat. |
| 上游河段的床面为沙垄所覆盖，而下游河段则为平整床面。 |
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| 29. | The harbour silted up a year ago. |
| 该港口一年前就淤塞了。 |
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| 30. | The mouth of the river has earthed up again this year. |
| 这条河的河口今年又淤塞了。 |
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