extra fee额外费用
extraadj.额外的n.额外之物;临时演员adv.特别地
Extracellular Polymers Substances胞外聚合物
extra-high-leaded brass alloy超高铅黄铜合金
extracurricular physical exercise课外体育锻炼
extracapillary glomerulonephritis毛细血管外肾小球肾炎
extradossed cable-stayed bridge矮塔斜拉桥
extraterrestrial life exploration地外生命探索
Extra Smooth Sun Protection Cream艳阳夏娇嫩防晒露
extracellular polymericsubstances胞外聚合物