吉他固弦钮松了怎么办:in the tree与on the tree有何区别?

in the tree与on the tree有何区别? 是in the tree 还是 on the tree? in the tree和on the tree 区别~~~在线等!!! on the tree和 in the tree有什么区别 在树上有on the tree 和in the tree,怎么区分? "on the tree"和"in the tree"有什么区别？ "in the tree "and "on the tree"区别 the tree fell on the canteen in the storm last night.请问这句话怎么翻译？ They planted the tree on the fram last week. on the river? in the river?