Necessity knows no law.

　　含义：铤而走险。

　　直译：需求面前无法律。

　　网络译意：饥寒起盗心

　　英文解释：neck or nothing

　　Take a bear by the tooth

　　to rush into a dangerous situation and ready to take all risks

　　to risk danger in desperation

　　指在无路可走的时候采取冒险行动。

　　铤而走险更多英语表达方式：

　　rush (ahead) into danger;

　　become reckless in desperation,

　　like an animal at bay;

　　make a reckless move;

　　neck or nothing;

　　Machine Gun McCain;

　　例句:

　　1. 你就一点没想过你这是铤而走险?

　　Have you even begun to think what a slippery slope you're on?