单词：protective mask
protective mask的用法和样例：
例句
- They contrived a mask against poison gas.他们设计了一种防毒面具。
- To protect myself from the sulfur smoke, I wore a gas mask, but the miners did not.为了在硫磺蒸汽中保护我自己，我带了一个防毒面具，但是这些矿工们什么保护措施也没有。
单词：protective mask 相关文章
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The dinner table buzzed with excited voices as the children told Grandfather about the yard sale and the old blue house and the mask Benny found. Wait, Ill show you! Benny dashed to his room and brought back the mask. Look, he said. Grandfather, said
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