extralityn.治外法权
extraadj.额外的n.额外之物;临时演员adv.特别地
extrahepatic bile duct肝外胆管
extra low carbon steel极低碳素钢
extracurricular survey课外调研
extra-meh ice system外融冰
extraterritorial right治外法权
extracurricular sports课外体育活动
extra-axial skeleton外轴骨骼(动)
Extrathoracic fixation胸外悬吊固定术
Extravasation of lymph淋巴外渗
extraterrestrial being外星人, 外星生物