呼救的英文是call for help.

例句：

A truck driver used his CB radio to call for help.

卡车司机用民用波段无线电呼救。

We heard his call for help.

我们听到他求救的叫声。

The ship radioed a call for help.

那艘船用无线电发出求救信号。

相关介绍

The next thing I did was to call for help.

接下来我做的事是呼救。

Please call for help when you are in danger.

当你有危险时，请大声呼救。

If you have a cell phone with you, call for help.

如果你手边有手机，呼叫救助。

When we have any difficulties, we can call for help.

每当我们有困难， 我们可以寻求帮助。

All ships sailing on the oceans call for help by radio in it.

在大洋上航行的轮船都用英语发出求救信号。