不要忘记在转换之前，你可以有一些时候只采用单侧换气，因而你正换气更频。

Don't forget you can breathe a few times to one side before swapping so you are breathing more often.

youdao

不要忘记在转换之前，你可以有一些时候只采用单侧换气，因而你正换气更频。

Don't forget you can breathe a few times to one side before swapping so you are breathing more often.

youdao