校长站在讲台上向学生们发表演讲。

The principal stood on the ___rostrum to deliver a speech to the students.

这艘罗马战舰的船首有一个锋利的冲角。

The Roman warship had a sharp ___rostrum on its prow for attacking enemy ships.

这种鸟的喙状结构非常适合捕食小鱼。

The bird's ___rostrum is perfectly shaped for catching small fish.