76. It was because he was in a very watery environment, safe fi.om the bacteria that need oxygen to live.

　　77. His hands and fingernails suggested that he hadn't done heavy manual work in his life—he could have been a rich man.

　　78. After spending a few minutes on a crowded city street, the brain is less able to hold things in memory, and suffers from reduced self-control.

　　79. The good news is that even slight alterations, such as planting more trees in the inner city or creating urban parks with a greater variety of plants, can significantly reduce the negative side effects of city life.

　　80. Previous studies have shown the longer the mom breastfeeds, the more benefit for her body.

　　英譯中

　　76.這是因?yàn)樗�處于一個(gè)潮濕的環(huán)境中，不會受到細(xì)菌的傷害，這些細(xì)菌需要氧氣才能生存。

　　77.他的手和手指表明他一生中沒有做過繁重的手工勞動(dòng)--- 他可能曾經(jīng)是一個(gè)有錢人。

　　78.在擁擠的街道上呆了幾分鐘之后，大腦會變得不太能記住東西，自我控制能力也會減少。

　　79.好消息是即使小小的改變都能減少城市生活所帶來的消極影響，例如可以在市中心種更多的樹，或是栽種各種各樣的植物來創(chuàng)造城市花園。

　　80.先前的研究表明母乳喂養(yǎng)的時(shí)間越長，母親的身體就會越受益。