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| 11. | never be worn and torn |
| 永不磨损 |
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| 12. | to offer a chance to extricate oneself from an awkward positio |
| 找台阶 |
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| 13. | step cutting pattern |
| 台阶图形 |
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| | |
| 14. | pavement wear |
| 路面磨损 |
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| | |
| 15. | epitaxial ledge |
| 外延台阶 |
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| 16. | calibration step |
| 校准台阶 |
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| 17. | pickup shoulder |
| 提升台阶 |
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| 18. | wear and tear gauge |
| 磨损测定仪 |
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| 19. | ascend the steps |
| 登上台阶 |
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| 20. | wear and tear |
| 消耗,磨损 |
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