birds of a feather flock together idiom saying
物以类聚，人以群分。
said about people who have similar characters or interests, especially ones of which you disapprove, and who often spend time with each other
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。