I must try to start his breathing at once by using the mouth-to-mouth way.

我必须立即用口对口吹气的方法给他做人工呼吸。

youdao

I must try to start his breathing at once by using the mouth-to-mouth way.

我必须立即用口对口吹气的方法给他做人工呼吸。

youdao