Fallea法莱亚fallv.落下；倒下；来临n.秋天；落下；瀑布fall ill from constant overwork积劳成疾fall-out radioactive material放射性沉积物falling-film tubular absorber降膜式列管吸收器Fallaway reverse and slip pivot并退左转至滑轴步fall short of sb's expectations辜负期望fall within sb. rs cognizance在某人的认识范围内, 为某人所认识; 在某人的管辖范围内falling body absolute gravimeter落体式绝对重力仪falling-ball type viscosimeter落球式粘度计fall within someone's cognizance在某人认识范围内...fall short of the specifications不合规格