乳牛的喂养方法发生了巨大的改变。The feeding of dairy cows has undergone a revolution.不能既想卖乳牛,又想喝牛奶.You cannot sell the cow and sup the milk.大多数乳牛约10个月后就不再有奶了.Most cows run dry in about 10 months....
设置或获得文档的安全域.Sets or gets the security domain of the document.曾参加过什么比赛或获得的奖项?What competition have you ever participated? Any award?它不是来自观念或获得知识.It is not about concepts or attaining knowledge....