I will tell the result by telegraph.

我打电报告诉你结果。

I telegraphed instantly I arrived there.

我一到就打电报。

Brevity is essential when you send a telegram or cablegram ; you are charged for every word.

打电报最主要的是简短，因为每一个词都是要收的。

We cabled congratulations to him.

我们打电报祝贺他。

Mother telegraphed me yesterday.

妈妈昨天打电报给我。