bluebird的复数形式怎么写

bluebird的音标：bluebird的英式发音音标为：['blu:bɜ:d]bluebird的美式发音音标为：['blubɜrd]...

n.北美洲产的蓝知更鸟...

A new Bluebird stopped in front of the door, and a gentleman helped a tall lady in it.一辆蓝鸟牌汽车停在门口, 一位绅士搀扶着一位高个女士上了汽车.Malcolm Campbell did it here , with a Bluebird.马尔科姆·坎贝尔 驾着他的蓝知更鸟(汽车品牌)BlueBird, the car he was driving,...