1. He sold the idea, now called a vacuum cleaner（真空吸尘器）, to a man named William H. Hoover. The company is still making Hoover vacuums and we're a little bit cleaner for it.
    他把这项现在叫做真空吸尘器的发明卖给了一个叫威廉·H·胡佛的男子。他的公司至今仍在制造胡佛牌真空吸尘器，我们的环境也因此而变得干净些了。