제 목    DGBRdJooAouWgRkOMu 이 름    Jasper 날 짜    2018/06/28 조 회    1 How do you do? equilibrium physics Other researchers had already proposed that the giant beasts would have found it very difficult, if not impossible to walk on all fours, because of their short, stiff spines and their slender arms with long fingers for grabbing foliage.