单词	现用对象
释义	现用对象active object
随便看	selector scale selector--sel selector stepping magnet selector switch selector, time-of-flight velocity selector-- time-of-flight velocity selector unit channel selector valve selector, velocity selector， mechanical neutron velocity selector， neutron velocity selector， pulse-height selector，sel selector， time-of-flight velocity selector， velocity select out select range select register selectric select rod insert select rod insert switch s-electron selectron selectron storage select routine