| 单词 | mortarboard | 
| 释义 | mortarboard mortarboard /ˈmɔː.tə.bɔːd/ aep /ˈmɔːr.t̬ɚ.bɔːrd/ noun [C] ► F0 a black hat with a square, flat top, worn on formal occasions by some teachers and students at college or university, and in the past by some schoolteachersThesaurus+: ↑Things worn to cover the head, face or neck  | 
	
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