normal airn.标准空气normaladj.正常的；正规的；精神健全的n.常态；标准Normal cardiac rhythm正常心律normal critical slope正常临界比降normal rate of return正常利润率normal adhesion force法向粘附力normal dynamic height正常动高normal operators load话务员标准负荷normal end rake angle前锋正刀面角normal glow discharge正常辉光放电normal profit pricing按正常利润定价normal curve of error正态误差曲线