| 21. | the rust of idleness. |
| 游手好闲的腐蚀作用。
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| 22. | a preventive against rust . |
| 防锈剂。
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| 23. | rust away. |
| 因生锈；成铁锈色；（使）变迟钝。
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| 24. | Better wear out than rust out. |
| 与其锈坏不如用坏；与其闲死不如忙死。
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| 25. | rust together. |
| （使两块金属或铁管的接头处）处锈而连在一起。
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| 26. | rust from disuse. |
| 因不用而生锈。
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| 27. | Rust frets metal. |
| 锈腐蚀金属。
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| 28. | Plastics don't rust like metal. |
| 塑料不会像金属那样会生锈。
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| 29. | The application of this paint makes the metal proof against rust . |
| 使用这种油漆能防止金属生锈。
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| 30. | This method of using "controls" can be applied to a variety of situations, and can be used to find the answer to questions as widely different as "Must moisture be present if iron is to rust ?" and "Which variety of beans gives the greatest yield in one season?" |
| 这种使用参照物的方法可以应用于许多种情况, 也能用来找到很不相同的各种问题的答案, 从“铁生锈, 是否必须有一定的湿度才行?”到“哪种豆类一季的产量最高?”
|