Suppose you have a tree object, and want to search its leaves in left-to-right order.

假定一个树对象，并且想要以从左到右的顺序搜索它的叶子。

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In the case of the tree object, Listing 11 shows a program to add a node to a tree object captured as verification point.

在tree对象中，列表11显示了一个添加节点到作为验证点获取的tree对象的程序。

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Listing 1 instantiates a default tree viewer; you can also customize the tree and instantiate the tree viewer by using a constructor with a tree object as the parameter.

清单1实例化一个默认的树查看器；您也可以定制树，并用树对象作为参数，用构造函数实例化树查看器。

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Mr. Smit's conclusion: locks should be able to wrap around a stationary object, like a tree.

WSJ: Sjoerd Smit of Vanmoof: A Designer Spin on the Grandma Bike

That is: lie in a ditch or ... (get) behind a heavy object if you had a tractor or even a tree.

CNN: A tornado's heading your way: Now what?