1. But when you live alone, the temporary absence of your friends and acquaintances leaves a vacuum; they may never come back.
    但如果你单独居住，那么朋友或熟人的暂时离别会使你感到空虚，也许他们永远也不会回来了。

2. When lights fuse, furniture gets rickety, pipes get clogged, or vacuum cleaners fail to operate,
    每当电灯保险丝烧断、家具榫头松动、管道堵塞、吸尘器不动时，

3. There has been a vacuum in his life since his wife died.
    他妻子去世后他的生活很空虚.

4. That leaves private industry — computer, phone, and cable companies — to move into the vacuum left by the government's absence.
    这就使得私人企业 -- 电脑公司、电话公司、有线电视公司 -- 得以填补由于政府无法顾及所留下的空缺。

5. 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。

6. As a result, air would be cleaner than in today´s cities.
    因此，空气会变得比现今城市里的空气还洁净。

7. Frankly, I'm proud. I'm doing an essential task. I left this country a little cleaner than I found it this morning. Not many people can say that tonight.
    说实话，我感到骄傲，我在做一项必不可少的工作。每晚工作结束时，我发现这个国家比早上更干净了。并不是每个人当晚都能这样说的。