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81. | exploratory study |
| 探测性研究 |
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82. | aquaculture study |
| 水产养殖研究 |
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83. | Metroplan Study |
| 都会计划研究 |
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84. | Thoughtful observation or study. |
| 研究留意的观察或研究 |
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85. | background study |
| 背景资料研究 |
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86. | ontogenetic study |
| 个体发生研究 |
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87. | study geography |
| 研究/学习地理 |
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88. | be under study | be under study for actio |
| 正研究中 |
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89. | scientific study |
| 科学的研究 |
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90. | method of comparative study |
| 比较研究法 比较研究法 |
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