There is an old saying that comes from the Bibte,

有句出自《圣经》的古老谚语说：

"The leopard¹ cannot change his spots. "

“江山易改，本性难移。”

This simply means that one cannot change his character,

这句话的意思是指人们无法改变他们的性格，

just as the leopard cannot get rid of the spots it was born with.

就像豹不能除去它一生下来就有的斑点一样。