Bin on1a．表达地区和空间，这两个介词都可使用，只是不同在于：前者是指范围，而后者则是指面层。例如：There is a multitude of islands in the Pacific．太平洋有许许多多岛屿。（指范围）Our ship has been cruising on the Pacific．我国轮船在太平洋航行。（指洋面）比较：They are living in Europe．他们在欧洲居住。（Europe 没有“面”的含义）They are living on the Continent．他们在欧洲大陆居住。（Continent则有“面”的含义）The ball rolls through...
on the tree是树上长的(例如:There are some oranges on the tree.树上长着一些橘子)in the tree是外来物在树上(例如:There is a bird in the tree.树上有一只鸟)如果实在分不清就记住例句.其实很好分别的,希望你遇到类似的问题不会做错....
