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| 51. | To support or reinforce with a buttress. |
| 支撑用支撑物支撑或加固 |
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| 52. | earth-baseplate resonance |
| 地面-底板共振 |
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| 53. | inverted-arch floor |
| 倒拱底板 |
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| 54. | level of base plate and support |
| 底板与支座标高 |
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| 55. | enlarging board |
| 放大机底板 |
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| 56. | Never before has the world seen such sustained[( sustain): vt.支撑；供养；忍受] growth[( growth): n.增长]; never |
| 在世界范围内这样可持续的发展前所未见，如此大规模的脱贫亦史无前例。 |
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| 57. | scraper ground plate |
| 扒斗底板 |
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| 58. | stone gobber |
| 【采矿】底板清理工 |
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| 59. | adjustable shoe sole |
| 可调刹车底板 |
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| 60. | double bottom tank top plating |
| 双层底内底板 |
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