fintie number of steps

例句：

1. 1. We need to countthe number of people in the room.
   我们需要数一下房间里的人数。
2. 2. The teacher asked us tocount the money we had received.
   老师让我们数一下我们收到的钱。
3. 3. The storekeeper counted the change fromthe customer's wallet.
   店主数了一下顾客钱包里的零钱。