GbEng
他不停地照著树干砍去. He was hewing away at the trunk of the tree.
这棵树看起来又高又壮,实际上树干是空的。 This tree looks high and strong but actually its trunk is hollow.
这个树枝已从树干上脱落了. The branch has separated from the trunk of the tree.
暴风雨把树枝从树干上刮了下来. The storm has split the branch off from the main tree trunk.