If use the spray, had better put on mouth-muffle in the airiness open space, don't suggest spray indoors.

如果如使用喷雾器喷涂，最好戴上口罩并在通风较好的空旷地上进行，不建议在室内喷涂施工。

youdao

I put my hand over my mouth to muffle my words, so only my friend could hear.

我把手挡在嘴上，遮住声音，仅让我的朋友听到。

youdao