we live in a biologically complex world, which is populated not only by humans and other large animals, but also by a plethora of other organis, all of which are harmful or deadly to us.
youyou tu discovered artemisinin, a drug that has significantly reduced the mortality rates for patients suffering from malaria.
视觉信号通信是在视觉范围内，用肉眼（或供助望远镜）接受信号的一种通信方式。
the shanghai stock exchange and the shenzhen stock exchange are under the supervision of china securities regulatory commission.
社会行政是将社会政策转化为社会服务，并运用所得经验调整社会政策的双向过程。
下列哪些作品体现了陶渊明崇尚自然的人生态度？
what are three main tools of monetary policy? ( )
refers to the process by which people use language to classify the world around and inside them.