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| 71. | natural stone slab |
| 天然石板 |
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| | |
| 72. | natural graphite |
| 天然黑铅 |
|
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| | |
| 73. | natural hydrochemistry |
| 天然水化学 |
|
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| | |
| 74. | natural thorium |
| 天然钍 |
|
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| | |
| 75. | natural organic pigment |
| 天然有机颜料 |
|
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| | |
| 76. | natural soil conditioner |
| 天然土壤改良剂 |
|
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| | |
| 77. | natural pharmacology |
| 天然药物学 |
|
|
| | |
| 78. | natural stratum |
| 天然地层 |
|
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| | |
| 79. | natural satellite |
| 天然卫星 |
|
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| | |
| 80. | natural water source |
| 天然水源 |
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