two's company, three's a crowd idiom saying
两人成伴，三人不欢。
said when two people are relaxed and enjoying each other's company but another person would make them feel less comfortable
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。