可以通过以下例子来理解这一点：第一句话，尽管他年轻，但他知道很多知识，即Though he is young.he knows much knowledge。也可以表达为：他年轻，但他知道很多知识，即He is young.but he knows much knowledge。同样，如果因为玛丽生病了，她没有去上学，那么可以写作Because Mary was ill.she was absent from school。或者用并列连词来表达：玛丽生病了，所以她没有去上学，即Mary was ill.so she was absent from school。