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| 81. | natural hardness |
| 天然硬度 |
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| | |
| 82. | native sulfate of barium |
| 天然硫酸钡 |
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| | |
| 83. | natural consolidatio |
| 天然胶结 |
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| | |
| 84. | natural nutrient |
| 天然养分 |
|
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| | |
| 85. | natural draft ventilation |
| 天然通风 |
|
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| | |
| 86. | natural grazing grounds |
| 天然牧场 |
|
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| | |
| 87. | natural exposure |
| 天然露头 |
|
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| | |
| 88. | natural iron oxide |
| 天然氧化铁 |
|
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| | |
| 89. | natural floral note |
| 天然花香 |
|
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| | |
| 90. | natural oil stone |
| 天然油石 |
|
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| | |