“发电报”常见的英文表达是 “send a telegram” ，也可表述为 “dispatch a telegram” 。
例句：
He sent a telegram to his family to inform them of his safe arrival.（他给家人发了一封电报，告知他们自己已安全抵达。 ）
In the past, people used to dispatch telegrams to communicate urgent news.（过去，人们常发电报来传递紧急消息。 ）