extraoral口外的
extraadj.额外的n.额外之物;临时演员adv.特别地
extracellular signal-regnlated kinase细胞外信号调节激酶
extraeellular signal-regulated kinase细胞外信号调节激酶
extra-high voltage transmission lines超高压输电线路
extravehicular activity spacesuit glove舱外航天服手套
extra- curriculum P. E. activities课外体育活动
Extracurricular study interesting groups课外学习兴趣小组
extracorporeal high-frequent treatment体外高频热疗
extracurricular educational institutions校外实验基地