安眠药的潜在危害(1)

科学60秒:寄生虫的阿基里斯之踵

Every villain has his Achilles' heel. And microscopic scoundrels are no exception. The challenge for those who wish to ____1____ microbial bad guys is to identify that weak spot. Now, scientists ...

价格的定义

价格的定义The Definition of "Price" Prices determine how resources are to be used. They are also the means by which products and services that are in limited supply are rationed ...

艾滋病感染得到控制(1)

联合国官方称，现有感染艾滋病病毒的人比他们预期的要少...United Nations officials now say fewer people than they thought are infected with the virus that causes AIDS. Last year, the agency known as...

安眠药的潜在危害(2)

科学家发现安眠药除了让人进入睡眠，还有一些潜在的危害The Food and Drug Administration did not say in its announcement how many cases of sleep-driving it has documented. However, the New York Times...