例句：
The stone steps were worn and broken.
这些石头台阶被磨平破裂了。
The stone struck her on the forehead.
石头击中她的额头。
A large stone landed right beside him.
一大块石头正好落在他身旁。
Most of the houses are built of stone.
这些房子多数是用石头建造的。
