精选优质文档-倾情为你奉上unit21.比尔已是个成熟的小伙子，不再依赖父母替他作主。Bill is a mature young man who is no longer dependent on his parents for decisions.2.这个地区有大量肉类供应，但新鲜果蔬奇缺。There are abundant supplies of meat in this region, but fresh fruit and vegetables are scarce.3.工程师们依靠工人们的智慧，发明了一种新的生产方法，使生产率得以提高。Drawing on the wisdom of the workers, the engineers invented a new production method that led to increased productivity.4.他花了许多时间准备数学考试，因此当他获知自己只得了个B时感到有点失望。He spent a lot of time preparing for his ma
