It's better to use a cordless vacuum cleaner when you see one crawling on your countertop.
2
当你拿着手提式无线吸尘器,吸除房间里的灰尘和面包屑时,你使用的是与宇航员在月球上使用的相同的技术。
When you're sucking up bits of dirt or crumbs around the house with a handheld cordless vacuum, you are actually using the same technology that astronauts used on the moon.
3
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。
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.