fourthlyadv.第四
fourthn.第四;四分之一;第四音阶;第四档
fourth generation fighter四代战斗机
Fourth Battle of Damascus第四次大马士革之战(1086)
Fourth-order dispersive四阶色散
fourth elliptic equations四阶椭圆方程
Fourth-order dispersion四阶色散
Fourth - order cumulant四阶累积量
Fourth coccygeal vertebra第四尾椎
Fourth Battle of Smolensk第四次斯摩棱斯克战役(1943)
fourth generation computer第四代计算机
Fourth Generation Fighters第四代战斗机