“通讯员”用英语怎么说？

这个小通讯员迟早会累垮的.The messenger boy will run off his legs sooner or later.一名通讯员被派遣给前线士兵送消息.A messenger was dispatched to take the news to the soldiers at the front.我们的外交通讯员是马克。Our Diplomatic Correspondent is Mark....