call sb. back
He never calls me back
回电给某人
他从不给我回电。
get back to sb.
You need to get back to me quickly on this.
稍后再联络某人
你一会得快速联系我。
get through to sb，
I always find it hard to get through to him.
He never answers his phone.
联络上某人
我发现总是很难联系上他，他从不回电。
中文翻译： 原版英语学习网编辑 Vicky