如果打印机是个活人,一定是那种办公室里大家都讨厌的同事,优柔寡断,小心翼翼,一点责任不肯担,不经反复确认不干活.有时打印一个文件,电脑确认两次,打印机还要再确认一次,很气人,真想编一串二进制码对它说"老子不真的打印,老子特为消遣你".鲁提辖拳打镇关西,就是这么打起来的.如果人类社会办点事都这样,人们早...
Poor estrus expression is one of the major reasons of reproductive inefficiency on large dairy farms. Farm managers usually try to overcome this difficulty by using various estrus detection aids (e.g. pedometers, accelerometers, tail chalk), however, each method has its own limitations. Estrus de...