灭火队必须穿防护服。
但是紫外线会损害工人的眼睛和皮肤，所以他们必须穿防护服和佩戴护目镜。
But this type of light can harm workers' eyes and skin, so they must wear protective clothing and goggles.
福美双是一种剧毒化学品，(美国)环保局审定为高危险级，规定农业工人必须穿防护服才能使用。
Thiram is a highly toxic chemical which the EPA examined and deemed to be so dangerous that agricultural workers are now mandated to wear protective clothing when handling them.
工作者必须穿的那些很难看到他们的脸的防护服对他们一点用也没有。
It does not help that the workers must dress in protective wear that makes it difficult to see their face.
消防人员必须穿全身防护服，佩戴呼吸设备，在上风向灭火。用水雾，泡沫，干粉或二氧化碳灭火。
Firemen must wear protective clothing, wearing breathing apparatus, in the wind. Suitable extinguishing media: Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
消防人员必须穿全身防护服，佩戴呼吸设备，在上风向灭火。用水雾，泡沫，干粉或二氧化碳灭火。
Firemen must wear protective clothing, wearing breathing apparatus, in the wind. Suitable extinguishing media: Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
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