to attack somebody far stronger than oneself; like an egg hitting a rock
鸡蛋岂能碰石头。
Why pick on someone stronger than yourself?
汉译英翻译词典收录86165条汉英翻译词条，基本涵盖了全部常用中文字词的英语拼写、翻译、音标、读音、用法、例句等，是英语学习的有利工具。