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| 71. | preliminary stratigraphy |
| 初级地层学 |
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| 72. | primary grouping |
| 初级分组 |
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| 73. | primary scattering |
| 初级散射 |
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| 74. | elementary chain |
| 初级链 |
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| 75. | primary sex organ |
| 初级性器官 |
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| 76. | primary-level health care |
| 初级保健 |
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| 77. | primary thylakoid |
| 初级类囊体 |
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| 78. | elementary cooperation |
| 初级合作社 |
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| 79. | primary training aircraft |
| 初级教练机 |
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| 80. | elementary geometry |
| 初级几何 |
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