英语句子改错,自己写的句子

第一句：as a teenager 和代词 our不匹配,需要改为as teenagersthus 是副词,相当于in this way。但making 要改为 to make,表示目的。整句修改：As teenagers,it is of importance to improve our ability of living independently,thus to make our lives more meaningful。第二句：This behavior 已经确指,不必用限制性定语从句,所以 which 之前要加逗号。love 和harmful 一个是名词,一个是动词,不匹配。by contrast 在此句中不恰当。整句修改：This behavior,which might ruin his life,is not beneficial/helpful but very harmful。 by contrast “相比之下”如：When you look at their new system,ours seems very old-fashioned by contrast。（看看他们的新系统,相比之下我们的看起来很老旧。）