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。
Often your best bet is to hand wash delicately, due to certain chemicals the cleaners use.
由于洗衣店会使用某些化学药剂，所以你最好自己手洗。
Most of the current cleaners and hand sanitisers that are on the market have some pretty nasty chemicals in them.
现在市场上的大多数清洁剂和洗手液都含有让人感觉不好的化学制剂在其中。
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