| 单词 | mortar board |
| 释义 | mortar board also mortarboard Word forms: mortar boards countable noun A mortar board is a stiff black cap which has a flat square top with a bunch of threads attached to it. In Britain, mortar boards are sometimes worn on formal occasions by university students and teachers. In the United States, mortar boards are worn by students at graduation ceremonies at high schools, colleges, and universities. |
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