1. Fire drills will be conducted in your residence hall every semester.
每学期在你的宿舍楼都会进行消防演习。
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2. It's the mother of all disaster drills for what could be the worst disaster in American history.
这是美国历史上最严重的灾难演习之“母”。
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3. The cordless, hand-held tools we use in our homes, such as vacuum cleaners, flashlights, drills and saws came from the technology of these early space programs.
我们家中所使用的无线手提工具，比如真空吸尘器、手电筒、钻头和锯，都来自于早期太空项目里的技术。
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4. The large lizard noticed that whenever the alarm bell rang during the school's practice fire drills, all the children and their teachers ran out of the classroom, leaving the lizard behind, peaceful and quiet for a while.
5. Understanding how brains reply to the sounds of dentists' drills could help scientists find ways to make patients more relaxed, according to Karibe, because patients who worry about going to the dentist might keep putting off their visits.
