老师：我要求画一头牛在吃草，为什么你只画了一头牛？

Teacher: I asked you to draw a cow eating some grass. Why did you only draw a cow?

youdao

退一步说，就算牛饲料百分之百是安全的，你又用什么来保证牛呼吸进去的空气百分之百是清洁的呢？

Even so, even if 100 percent of feed cattle are safe, what you breathe into the cattle to ensure that the air is 100 percent clean it?

youdao

退一步说，就算牛饲料百分之百是安全的，你又用什么来保证牛呼吸进去的空气百分之百是清洁的呢？

Even so, even if 100 percent of feed cattle are safe, what you breathe into the cattle to ensure that the air is 100 percent clean it?

youdao