N-COUNT A jackhammer is a large hammer, powered by compressed air, that is used for breaking up rocks and other hard material. 手提钻
Outside a jackhammer was pounding away at a particularly stubborn piece of concrete.
在外头，一个手提钻正在猛打一块特别坚硬的混凝土块。
The swirl of construction dust and sound of jackhammers can be overwhelming during the day. Some say the city looks best at night.
白天城市到处都是建筑灰尘和工地上的声音。有人说，晚上这座城市最漂亮。
As fire and debris fell, cars blew up; the air smelled of smoke and concrete, that smell that spits out of jackhammers chewing up pavement.
随着残骸和火焰的坠落，街上的汽车开始爆炸。空气中弥漫着烟尘和混凝土的气味——那种风镐敲碎路面时发出的气味。
Noise is another hazard. Working with noisy tools such as jackhammers requires proper, effective use of hearing protection. Ear plugs and earmuff type hearing protection is recommended.
噪音是另一种危险。使用手提钻之类的噪音工具时，必须佩戴有效的听力保护装置。建议使用耳塞和耳罩听力保护装置。
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