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