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| 51. | slack the whole afternoon |
| 荒废了整个下午 |
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| 52. | slack at one's job |
| 怠忽职守 |
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| 53. | slack in maintaining discipline. |
| 在遵守纪律方面疏忽的 |
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| 54. | period of slack sales |
| 销售淡季 |
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| 55. | The rope hung slack. |
| 那条绳子松悬着。 |
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| 56. | slack adjuster worm gear |
| 减速调整器蜗轮 |
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| 57. | slack adjuster worm plunger |
| 减速调整器蜗杆柱塞 |
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| 58. | Hatch-Slack-Kortschak pathway |
| 哈奇－斯莱克－科特萨克途径 |
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| 59. | hoist slack-brake switch |
| 吊车制动器过松开关 |
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| 60. | caused by bundle slack |
| 由于捆松的原因而造成的 |
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