百足之虫死而不僵
a centipede dies but never falls down
old institutions die hard
备而不用
have something ready just in case
keep something for possible future use
不相关且不独立
uncorrelated and dependent
藏而不泻
storage without excretion
藏精气而不泻
storing essence without leaking
长而不宰
To be superior but not to control