frontaladj.前的；正面的；额的n.额饰；祭坛前面的罩巾；建筑物的正面；三角门楣frontal region额区frontal attackn.正面攻击Frontal lobule额叶frontal theory锋面理论frontal squama额鳞frontal system锋系frontal lunule额眉片Frontal recess额隐窝frontal injury睛明骨伤frontal artery额动脉