In this study,purebred Mongolian cattle were treated with a series of technical means including superovulation,artificia......

Over the past seven decades, the grain yield of maize(Zea mays L.) has increased continuously in China, mostly due to hy......

RED技术的产生为解决网络的拥塞提供了良好的办法，但随着网络的发展、业务的丰富，RED技术的缺点也越来越明显。这种缺点的显现也推动......