n.树枝状组织；植树
动词tree的现在分词形式.
As the wind rose to eighty miles an hour, tree after tree crashed down. 当风速增加每小时80英里时，一棵接一棵的树被刮倒了。
The trees were planted at 20 ft intervals. 这些树是每隔20英尺栽种一棵的。
The tree is said to be six hundred years old. 这树约莫已有600年树龄了。
As a result, they saved 90% of the trees in the forest. 结果他们拯救了这座森林里90％的树木。
