安迪发现了一个小树桩。
一道闪电击中了附近的一个小树丛，好些树都被烧毁了。
One fork of lightning crashed into a nearby grove, and several trees were badly burned.
对于几乎每一个棋类博弈游戏程序来说，极大极小树（the minimax tree）都是其中的核心。
The minimax tree is at the heart of almost every board game program in existence.
但是，有一个例外：那棵小树苗。
今天，我给大家讲一个森林里的小树的故事。
Today, I'd like to tell you a story about a tree in the forest.
但是，有一个例外：那棵小树苗。
安娜：嗯，但是一个老人可能甚至不能移动一棵小树。
Anna: Mm, but an old man probably couldn't even move a small tree.
安娜：嗯，但是一个老人可能甚至不能移动一棵小树。
Anna: Mm, but an old man probably couldn't even move a small tree.
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