extra tea顶上嫩茶
extraadj.额外的n.额外之物;临时演员adv.特别地
extra large capacity motor超大型电机
extraosseous ameloblastoma骨外成釉细胞瘤, 骨外造釉细胞瘤
extracampine hallucination感觉域外幻觉
extramammary Paget disease畸形性骨炎, 乳房外佩吉特病
extraterrestrial radiation地外辐射,行星际辐射
extrapolation to the limit外推极限法
extra deep-drawing steel极深冲钢,优质深冲钢