这是最有力的方式建立自己的自然免疫系统。

This is the most powerful way to naturally build your immune system.

youdao

不过你也可以把它们看成是身体的自然免疫系统。

Or, you can see them as the body's natural defense system.

youdao

不过你也可以把它们看成是身体的自然免疫系统。

Or, you can see them as the body's natural defense system.

youdao