constancyn.坚定不移；恒久不变；忠诚；【生】恒有度constancy of great number大数恒性constancy of heater motion加热器恒定运动constancy of test condition试验工况的稳定性constancy of apparent speed视速恒常性CONSTANCY AND DISCRETION.望坚贞和谨慎。”constancy of available acts有效行为的不变性constancy of interfacial angle面间角守恒定律|面角守恒定律constancy measuring instrument等值灵敏度测定仪constancy of internal environment体内均衡作用constancy between husband and wife夫妻之间忠贞不渝