A well-known explorer came on the cruise as a guest lecturer.一位著名的探险家以特邀演讲者的身份加入了此次巡游。We had a guest lecturer in class today.今天我们课堂上来了一位特邀演讲者。The guest lecturer is a novelist of rank who has won many prestigious awards.这个特邀讲演者是位受人尊敬的小说家，曾获得很多享有盛誉的奖项。