Ramsey先生是我们学校的数学老师。

Mr. ___Ramsey is the math teacher at our school.

拉姆齐理论在组合数学中扮演着重要角色。

___Ramsey theory plays a significant role in combinatorial mathematics.

拉姆齐是英国一个美丽的海滨小镇。

___Ramsey is a lovely coastal town in England.