短語詞組短語falling -body viscometer 落體黏度計free falling body 自由落體;自由落體類falling body motion 落體運動falling body viscometer 落體粘度計;落體黏度計acceleration of falling body 落體加速度falling body absolute gravimeter 落體式絕對重力儀falling body in shaft 井內(nèi)墜物 返回 falling body