[It's easy to change rivers and mountains but hard to change a person's nature;a fox may grow grey,but never good;a sow,when washed,returns to the muck;it is hard to change man's natural disposition than to change rivers and mountains] 政體容易更改,本性難于變移,比喻生性風(fēng)格或既成的事實(shí)難以改變
