plum pit

例句：

1. 1.The plum pit was filled with water and mud.
   梨坑里充满了水和泥。
2. 2. They dug a hole in the ground to get at the plum pit.
   他们挖了一个洞来挖梨坑。
3. 3.The farmer carefully removed the plum pit from the tree.
   农民小心地从树上移开了梨坑。