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| freshwater ecosystem | |||
| fresh water ecosystem | |||
| freshwater ecosystem The living organisms and nonliving materials of an inland aquatic environment (内陆水环境中的生物和非生物。) | |||
| fresh-water ecosystem | |||
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淡水 生 态系统 : 6 phrases in 2 subjects |
| Technology | 4 |
| Water resources | 2 |
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