肉眼看不到它们,但它们的确存在。尽管我们花几个小时去打扫,并确信一切都是干干净净的,但我们的家里仍充满了无数的细菌。它们在牙刷里繁殖、在洗碗布和抹布里恣意生长,它们生活在电话听筒里,如果它们会笑的话,数百万细菌一定正在洁白的抽水马桶上满足地微笑呢。 They are not visible to the naked eye, but they do exist. Although we spend hours cleaning and making sure everything is clean, our home is still full of innumerable bacteria. They breed in toothbrushes, grow freely in dishcloths and rags, and they live in the telephone handsets, and if they can laugh, millions of bacteria must be content to smile on white toilet bowls.