[dòng rú tuō tù]   

动    如    脱    兔    比喻行动敏捷。

动如脱兔，成语， 比喻行动敏捷。“动如脱兔”常与“静若处子”连用。

As nimble as an escaping hare when going into action

动量定理    动魄惊心    动人肺腑    动地惊天    动心骇目