词汇	stem mother
释义	stem mother 干母
随便看	vertical astigmatism compensator vertical asymptote vertical asynchronous motor vertical atenna Vertical atmosphere refraction vertical atmosphere stability vertical atmospheric column Vertical Atmospheric Sounder vertical attached power vertical attack vertical attack type vertical-attitude takeoff and landing vertical-attitude takeoff and landingvatol vertical audit vertical auger drill vertical autoclave vertical automatic press vertical automatic press filter Vertical average kinetic energy vertical awner vertical axial error vertical axial flow pump vertical axial-flow pump vertical axial-flow pumps vertical axis