tree well

例句：

1. 1. The old oak tree is in the middle of the forest, and there's a deep tree well nearby.
   那棵老橡树位于森林中央，附近有一个很深的树坑。
2. 2.The children were playing in the tree well when their mother called them home.
   当孩子们在树坑里玩耍时，他们的妈妈叫他们回家了。
3. 3. The tree well was filled with water from the rain, and it looked like a miniature pond.
   树坑里积满了雨水，看起来像一个小池塘。