单词	changed cost
释义	changed cost 变动成本
随便看	ultrasonic diffraction ultrasonic diffraction crystal grating ultrasonic diffraction grating ultrasonic diffraction microscope ultrasonic diffraction modulator ultrasonic diffraction tomography Ultrasonic digestion ultrasonic digital water level gauge ultrasonic dilator ultrasonic-directed transformation ultrasonic direction-finder ultrasonic disc cutter ultrasonic disintegration ultrasonic disintegrator ultrasonic dispersal ultrasonic dispersing ultrasonic dispersion ultrasonic-dispersion ultra sonic dispersion ultrasonic dispersion technique ultrasonic disruption ultrasonic disruption rate ultra-sonic distance ultrasonic distance measure ultrasonic distance measurement