selectives选项课
selectiveadj.选择的;选择性的;精挑细选的
selective benefit选择性益处
selective courses选修课
selective heating局部加热
selective trigger选择性扳机
selective logging选伐,选择砍伐
selective entropy选择平均信息量,选择熵
selective wetting优先润湿
selective selling有选择的销售
selective emitter选择性发射极
selective reagent选择试剂