them and us
我們和他們之間的差異或對立，尤其指社會階層、群體或團體之間的對立
口語·描述對立關系
英文釋義
a division or separation between two groups, often based on differences in opinions, values, or social status
例句
In this company, it's always them and us between management and staff.
典故來源
源自社會群體對立概念，強調兩個陣營的差異和隔閡。