If you are making a long distance call on a public telephone and run out of money, give the number on your phone to the person you're talking to. Then hang up the receiver and he can call you back.
如果你用公共电话打长途，钱花光了，把你的电话号码给你正在通话的人，然后挂上电话，他会给你回电话的。
2
Give them a call and hang out sometime.
给他们打个电话，约个时间出去逛逛吧。
3
It will also give engineers and builders around the world a dependable standard - or as Harries says, a testing method they can hang their hat on.