The other types of node hold references to left and right HCNodes so as to construct the tree.

其它类型的节点拥有左 HCNode 和右 HCNode 的引用，以便于构造树。

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Hold your right hand out and, using the index and middle fingers of your left hand, stretch between each as shown.

伸出你的右手，然后用左手的食指和中指按图示方法对右手的各个手指进行拉伸。

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If you always hold the ice cream spoon in your right hand, hold it in your left; if you always eat out of the container, put it in a bowl.

如果你吃冰淇淋时总是右手拿勺，那就换成左手；如果你总是用手抓着吃，那就把食物盛在盘里。

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First, in order to turn you have to lean over to drag a hand, right or left, while grabbing hold of the sled on the opposite side.

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