估计人类的四分之一深受原生动物性疾病之害。

It has been estimated that at any given moment a quarter of mankind is afflicted with severely debilitating protozoan diseases.

youdao

估计人类的四分之一深受原生动物性疾病之害。

It has been estimated that at any given moment a quarter of mankind is afflicted with severely debilitating protozoan diseases.

youdao