It's commonly found in arid regions to provide protection from direct exposure to the sun, as well to protect the mouth and eyes from blowing dust and sand.

这种头巾在干旱地区很常见，他可以提供保护，免受太阳直接暴晒护，同时也可以保护嘴巴和眼睛免受飞尘和飞沙的伤害。

youdao

But people may worry about getting sick from blowing into a stranger's mouth.

但是，人们可能会担心因向陌生人嘴里吹气而患病。

youdao

But people may worry about getting sick from blowing into a stranger's mouth. Also, the training is easy to forget, especially during an emergency.

但人们可能担心直接对陌生人的口部吹气会传染疾病，特别在紧急情况下培训过程容易忘记。

youdao

But people may worry about getting sick from blowing into a stranger's mouth.

VOA: special.2009.06.09