1. The speaker stood on the rostra to address the crowd.
演讲者站在讲台上向人群发表讲话。

2. The rostra in ancient Rome was a platform where officials would make speeches.
古罗马的讲台是官员发表演讲的地方。

3. The students gathered around the rostra to listen to the professor's lecture.
学生们聚集在讲台周围听教授讲课。

4. The rostra in the auditorium was beautifully decorated with flowers.
礼堂里的讲台被鲜花装饰得很漂亮。

5. The general addressed his troops from the rostra before battle.
将军在战斗前从讲台上向部队讲话。

6. The rostra in the town square was where public announcements were made.
镇广场上的讲台是用来发布公告的地方。