roundel
柯林斯词典
1. N-COUNT A roundel is a circular design, for example one painted on a military aircraft. 圆形设计
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roundel /ˈraʊndəl/ (roundels)
剑桥词典
- a circular decoration , especially a coloured circle on a military aircraft that shows its nationality
圆形装饰；（尤指战斗机上显示国籍的）圆形标记 返回 roundel