He took three steps backwardly .

他倒退了三步。

Can you say the alphabet backwardly ?

你能倒著念字母表吗？

Results : the musculus psoas major of rabbit can drive its lumbar vertebra to move toward anterior abdomen and backside . With posterior limbs backwardly extended , its lumbar vertebra will present to bend toward anterior abdomen .

结果家兔的腰大肌能带动腰椎向腹（前）向背（后）运动，高度后伸后肢腰椎刚出现向腹（前）的弯曲。