Fallea法莱亚fallv.落下；倒下；来临n.秋天；落下；瀑布falling needle viscosimeter落针粘度计fall within the coverage of属于范围之内falling off of drill string跑钻Fall in alongside fall into可分成开始Fall Back Safety Technician导弹发射安全区技师falling condition of charge炉料下落条件fall prostrate on the floor跌倒在地板上fall backward onto the sand面朝天向后倒在沙上falling sphere viscosimeter落球粘度计falling rate of water level水位降速