例句：
This is Mission Control calling the space shuttle Discovery.
这是地面指挥中心呼叫航天飞机“发现号”。
He didn't even have the intelligence to call for an ambulance.
他连呼叫救护车的头脑都没有。
I called in at my local on the way home.
我回家途中去了我住处附近的酒吧。
Call it what you will, it's still a problem.
不管怎么说，这仍然是个问题。
There were calls for major changes to the welfare system.
有人要求对福利制度进行重大改革。