柯林斯词典birr /bɜː/ [美国英语] 1. V to make or cause to make a whirring sound 发出呼呼声2. N a whirring sound 呼呼声birr /bɜː/ N 1. N the standard monetary unit of Ethiopia, divided into 100 cents 比尔; 埃塞俄比亚货币单位 返回 birr