定指右边的（ on the right),所以要用定冠词that 也是特指啊，当有后置定语修饰时，通常用 the one。如：My room is better than the one next door. 我的房间比隔壁房间好。He said he would have the one near him. 他说要靠近他的那一个。但是，若后置定语为 of 引起的介词短语，则通常用 that。如：The population of China is much larger than that of Japan. 中国人口比日本人口多得多。A grandparent’s job is easier than that of a parent. 祖父母的任务比父母的任务要轻松一些。