There is an apple in the tree. in the tree or on the tree

on the tree
树上生长的东西
in the tree
(外来的东西)在树上
例句与用法:
1.Some magpies was singing in the tree when I left home for the first time,a good omen in Chinese culture.
当我初次离家时,喜鹊在树上唱歌,在中国文化中这是个好预兆.
2.The arrow stuck in the tree.
那支箭射在树上.
3.The bird sang high and clearly in the tree.
鸟儿在树上清脆地高歌.
4.Sap flowed from the gash in the tree.
树液从树的切口处涌出