extrahead反常带头
extraadj.额外的n.额外之物;临时演员adv.特别地
extracellular voltage细胞外电压
extrapolation formula外推公式
extra-high pressure超高电压
extrapsychic conflict外在冲突
Extracellular amylase胞外淀粉酶
extramural department校外系,校外部
extratropical monsoon中纬度气旋
extravehicular gloves航天器外工作手套
extra official titles加官
extrauterine fetation[医] 子宫外妊娠