進ㄐㄧㄣˋjìn退ㄊㄨㄟˋtuì中ㄓㄨㄥˋzhòng繩ㄕㄥˊshéng

  1. 進退都合乎法度。《莊子·達生》：「進退中繩，左右旋中規。」

英to advance or retreat, each has its rules (idiom from Zhuangzi)​; many translations are possible