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| 91. | natural tritium |
| 天然氚 |
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| | |
| 92. | natural pasture |
| 天然牧地 |
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| | |
| 93. | natural pollution |
| 天然污染 |
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| | |
| 94. | naturally-occurring uranium |
| 天然铀 |
|
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| | |
| 95. | natural protein |
| 天然蛋白质 |
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| | |
| 96. | natural terrain obstacles |
| 天然障碍物 |
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| | |
| 97. | natural resin paint |
| 天然树脂漆 |
|
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| | |
| 98. | natural whet stone |
| 天然磨刀石 |
|
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| | |
| 99. | natural seeding |
| 天然下种 |
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| 100. | spontaneous magnetism |
| 天然磁性 |
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