隐孢子虫和贾第鞭毛虫是两种严重危害水质安全的病原性原生动物。

Cryptosporidium and Giardia axe two common species of pathogenic protozoan, seriously endangering the water quality.

youdao

隐孢子虫和贾第鞭毛虫是两种严重危害水质安全的病原性原生动物。

Cryptosporidium and Giardia axe two common species of pathogenic protozoan, seriously endangering the water quality.

youdao