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| 81. | protection forest system |
| 防护林体系 |
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| 82. | borate salt system |
| 硼酸盐体系 |
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| 83. | geocentric system |
| 地心体系 |
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| 84. | Yalta System |
| 雅尔塔体系 |
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| 85. | water supplying system |
| 供水体系 |
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| 86. | multivariant system |
| 多变体系 |
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| 87. | The Exchange System |
| 交换体系 |
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| 88. | ecological systems |
| 生态体系 |
|
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| 89. | carbon dioxide system |
| 二氧化碳体系 |
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| 90. | knowledge hierarchy |
| 知识体系 |
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