柯林斯词典bird dog [美国英语] 1. N a dog used or trained to retrieve game birds after they are shot 捕鸟猎犬[hunting] 2. V to control closely with unceasing vigilance 密切观察[非正式] 返回 bird dog剑桥词典a gun dog (猎人用来找回被射杀禽鸟的)猎狗 返回 bird dog