【英语时差8,16】百分百干净（上）

（单词翻译）

Being clean is a good thing. After all, simply washing your hands regularly can help ward¹ off flu and other contagious² diseases. Is It Possible To Be Too Clean? Maybe… For the past few decades scientists have been debating the so called “hygiene hypothesis”–the idea that being exposed to a wide range of microbes early on helps strengthen the immune system. According to the hypothesis, too much anti microbial cleanliness at a young age can throw the immune system out of whack³, causing it to overreact later on. Now, a study lends support to this idea. Scientists have found that bacteria living on our skin help prevent cuts from becoming inflamed⁴ when the immune system reacts to the wound.