extra old特等陈年威士忌酒
extraadj.额外的n.额外之物;临时演员adv.特别地
extra-budgetary funds预算外资金
extra-class education课外教育
extraembryonic ectoderm胚外外胚层
extra-seasonal mating季节外交配
extrafusal muscle fiber梭外肌纤维
extrapyramidal disorder锥体外障碍洗眼杯疾病
extragalactic supernova河外超新星
extra central telescope附加对中望远镜
extra-light drive fit轻压配合
extra - large chamber特大洞室