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| 61. | further the study of |
| 进一步研究… |
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| 62. | longitudinal study |
| 纵贯研究 |
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| 63. | graphic investigatio |
| 图解研究 |
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| 64. | geological research |
| 地质研究 |
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| 65. | engineering study |
| 工程研究 |
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| 66. | empirical study |
| 实证研究 |
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| 67. | environmental research |
| 环境研究 |
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| 68. | increment study |
| 生长研究 |
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| 69. | epidemiological studies |
| 流行病学研究 |
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| 70. | development research |
| 开发研究 |
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