单词	母体(陨石)
释义	母体(陨石)parent body
随便看	proportional basicity proportional command proportional compass proportional compasses proportional control proportional control action proportional controller proportional control {= p control} proportional control valve proportional counter proportional-counter proportional counter spectrometer proportional counter tube proportional counter，pc proportional damping proportional-derivative action proportional-derivative action{=pd action} proportional-derivative control proportional-derivative controller proportional detector proportional device proportional difference estimate proportional difference operator proportional-differential control proportional distribution