Proper infection dosage and routes were selected to make the chickens artificially infect avian colibacillosis successfully.选择适宜的攻毒剂量和攻毒途径,诱发淮南麻黄鸡大肠杆菌病....
'It is clear that my client has been less than frank with me,' said his lawyer, through gritted teeth.“我的当事人显然没有告诉我实情，”他的律师咬牙切齿地说道。He gritted his teeth and plunged into the cold weather.他咬咬牙,冲向寒冷的天气.The rest of...