介词用法he is junior to me by two years.这里为什么用by?这里是什么用法?

He is junior to me by two years.他比我小两岁,在这里为什么用by,不用别的介词? It is now being sent to his home by train ,这里being什么用法 by 这里算什么意思,什么用法? by 在这里的含义及用法 英语中介词by 的用法是什么 what's the time ()your watch 为什么要用介词by by在这里的中文意思是什么? 为什么不是 Peter will driving me home tonight.这里的"is"是什么用法? She is my junior by seven years. he give me something to remember him by.需要介词By吗?为什么? 英语翻译是不是也可以说“he is older than me by two years. by 介词的用法疑问. he could hear shouting in the camp itself.这里为什么用itself,是什么用法