To do so, it will pick off the first element of the list — the head — to do the processing on that element, and recursively pass the rest of the list to itself again.

为此，它将选取列表的第一个元素 — 列表头部 —来对该元素执行处理，然后再递归式地将列表的其余部分传递给自身。

youdao

To do so, it will pick off the first element of the list — the head — to do the processing on that element, and recursively pass the rest of the list to itself again.

为此，它将选取列表的第一个元素 — 列表头部 —来对该元素执行处理，然后再递归式地将列表的其余部分传递给自身。

youdao