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TODO：占个位置以后再写
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```javascript
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const node = {
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name: "node 1",
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children: []
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};
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function DFS(node) {
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console.log("探寻", node.name);
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node.children.forEach(child => {
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DFS(child);
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});
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console.log("回溯", node.name);
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}
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```
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