to have a discerning eye for goods
不怕不识货，就怕货比货。
It doesn't matter if one can't judge the quality of a product, just compare it to other products of inferior quality and one will know.
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。