a cat has nine lives字面意思猫有九条命，旧时的英国人迷信猫的顽强生命力，故有猫有九命之说。该谚语又作“富有生命力的人”。

【例句】
The baby fell from the roof of the house, but nothing went wrong with him. His parents called him a cat that has nine lives.
这孩子从房顶上掉下来居然没摔坏，他的父母说他命真大。

The modern belief that a cat has nine lives comes from this tradition.
现代人认为猫有九条命，就是受了古埃及传统的影响。