常見例句雙語例句Because it needs clean water to survive, the new bug is a crucial "index species" that could be used to gauge a river's health, NIBR's Min-Ha said.因爲(wèi)它必須在乾淨(jìng)的水源地生活，因此它可以被看作是檢騐水質(zhì)標(biāo)準(zhǔn)的生物。 返回 bug river