two's company, three's a crowd1 three’s a crowd two’s company ALONEused to suggest that two people would rather be alone together than have other people with them 两人为伴，三人不欢〔用来表示宁可只有两个人而不要更多的人加入他们〕 → part company at part2(4), → present company excepted at present1(6) → two’s company, three’s a crowd at company(3)
2 three’s a crowd two’s company ALONEused to say that it is better to leave two people alone to spend time with each other 两人成伴，三人不欢 → two’s company, three’s a crowd at two(10)