to know through and through
我们是老朋友啦，彼此都知根知底。
We're old friends, and know everything there is to know about each other.
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。