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| 71. | natural ambient level |
| 自然环境的悬浮固体水平 |
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| 72. | environment and habitat |
| 环境和生境 |
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| 73. | important ecological habitat |
| 生态上具重要价值的生境 |
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| 74. | preservation of the natural environment |
| 对自然环境的保护 |
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| 75. | World Habitat Day |
| 世界人居日 |
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| 76. | A natural environment or locality. |
| 一个自然环境或地点 |
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| 77. | wildlife habitat index |
| 野生生物生境指数 |
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| 78. | physical capacity of the natural environment |
| 自然环境物质负荷能力 |
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| 79. | rocky intertidal habitat |
| 潮间岩生境 |
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| 80. | natural environmental stress |
| 自然环境压力; 自然环境问题 |
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