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biotic index
ecol. ［水体］生物群指数
space 生物指数
tech. 生物污染指数; 生物指标
biotic index Scale for showing the quality of an environment by indicating the types of organisms present in it (e.g. how clean a river is)
environ. 生物指数 (是通过指示目前的生物种类来显示环境质量的一种量度。)
biotic index: 17 phrases in 5 subjects
Desert science1
Earth sciences3
Ecology1
Technology7
Water resources5

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