The copied tree is made a slave of the root tree so that mount actions in the root tree are propagated to the copy but not the other way around.

这个复制的树是根树的从属挂载，所以根树中的挂载活动会传播到这个拷贝，但是不会反向传播。

youdao

Robinia Pseudoacacia is a deep root tree.

刺槐在遗传特性上表现为深根性树种。

youdao

These include sassafras,vanilla, wintergreen, cherry-tree bark, licorice root, black cherry and cane sugar.

VOA: special.2011.08.01

The point I wanted to make is that for every node, except the leaves, the leaves are the bottom of a tree in this case, are weird, right, they draw trees where the root is at the top, and the leaves are at the bottom.

你没必要看到整棵树，我想说的重点是,对每个节点来说，除了叶子节点,叶子节点指的是树的最下面的节点，电脑科学家都很奇怪,他们画树的时候根是在最上面的。

麻省理工公开课 - 计算机科学及编程导论课程节选

Getting its name from the sassafras tree root originally responsible for its unique flavour, root beer was an exclusively North American beverage until recently.

BBC: What should I drink in your country?

One morning in September 1940, a boy called Marcel Ravidat was exploring the hills above Montignac when his dog, Robot, uncovered a hole beneath a tree root leading to a cave.

BBC: The perfect trip: Dordogne

The Pingwings were knitted penguin puppets who lived in Firmin's barn while The Pogles lived in a tree-root in a wood.

BBC: Oliver Postgate & Bagpuss