Put simply, probiotics are harmless bacteria that help protect the human body from harmful bacteria.

简单地说，益生素是无害的细菌，能保护人体免遭有害细菌的侵袭。

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Put simply, probiotics are harmless bacteria that help protect the human body from harmful bacteria.

简单地说，益生素是无害的细菌，能保护人体免遭有害细菌的侵袭。

youdao