Once you're out and evacuating, you want to keep as much of your skin, your mouth and nose covered, as long as that covering doesn't impede you moving and getting out of there.
每当你在户外或者在转移过程中 你需要尽可能地用东西盖住自己的皮肤 以及口鼻，只要这些覆盖物 不会影响到你的移动和撤离