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71. | atomic propulsion nuclear engine |
| 核发动机 |
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72. | exercise motive |
| 练习动机 |
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73. | internal motivation |
| 内在动机 |
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74. | theories of motivation |
| 动机理论 |
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75. | unconscious motivation |
| 潜意识动机 |
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76. | speculative motive |
| 投机动机 |
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77. | vegetative motivatio |
| 生存动机 |
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78. | being motivation |
| 存在动机 |
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79. | reason for; grounds for |
| 理由;动机 |
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80. | the chief (= main) motive |
| 主要动机 |
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