| 词汇 | biotic index |
| 释义 | biotic index noun [ C ] environment specialized uk/baɪˌɒt.ɪk ˈɪn.deks/ us/baɪˌɑː.t̬ɪk ˈɪn.deks/ 生物指数 a way of measuring the pollution (= dirty substances) in water, e.g. a river, by counting the organisms in it |
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