extrahead反常带头
extraadj.额外的n.额外之物;临时演员adv.特别地
extracellular xylanase胞外木聚糖酶
extraeellular protease胞外蛋白酶
Extramyocellular lipid肌细胞外脂质
extra heavy duty truck特重载重车
extramedullary disease髓外病
extra-floral nectary花外蜜腺
extra-channel theory奇经
extra low permeability特低渗透
extranuclear chromatin核外染色质
extra path information附加路径信息