mouth shad

• 口罩

mouth shad的用法和样例：

例句

1. Masks should fit snugly over the nose and mouth.
   口罩必须紧密覆盖口和鼻。
2. If you go out without a mouth mask,you'll probably catch your death of cold.
   如果你外出不带口罩，很可能就要患重感冒。