stall regulated rotor

例句：

1. 1. The horse was in the stall whenI arrived.
   我到达时，那匹马在马厩里。
2. 2. The farmer needs to cleanthe stalls regularly.
   农民需要定期清理马厩。
3. 3. The stall is empty now, but it used to be full ofhorses.
   现在这个马厩是空的，但以前都是马。