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71. | mindless of danger |
| 不顾危险 |
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72. | mathematical danger |
| 数学危险 |
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73. | contamination hazard |
| 污染危险 |
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74. | danger limitvalue |
| 危险极限值 |
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75. | hazardous chemicals |
| 危险药品 |
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76. | risk of disturbance |
| 危险故障 |
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77. | hazardous commodity |
| 危险商品 |
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78. | a desperate situation |
| 危险境地 |
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79. | risk alarm system |
| 危险警报系统 |
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80. | dangerous atmosphere |
| 危险大气环境 |
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