约翰尼·沃里克在亚拉巴马州有个养猪场。Johnny Warrick has a hog farm in Alabama.可是, 现在英格兰 、 苏格兰 、 丹麦、瑞典都有这种户外型养猪场.Still, outdoor herds are found in England, Scotland, Denmark and Sweden.一次参观某集体农庄养猪场, 发现一头病歪歪的小猪.See some collective grange fa...
Objective : To study the effect of housefly larval secretion on the development of Ascaris suum eggs.目的: 观察家蝇幼虫分泌物对猪蛔虫卵发育的影响.The Ascaris adults may perforate a suture line or cause a bile or pancreatic duct obstruction.成...