Big Brother
US /ˈbɪɡ ˈbrʌðər/
UK /ˈbɪɡ ˈbrʌðər/

1.
老大哥, 全面监控者
a person or organization exercising total control over people's lives
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The government's new surveillance program feels like Big Brother is watching us.
政府的新监控项目让人感觉老大哥在监视我们。
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The novel '1984' introduced the concept of Big Brother.
小说《1984》引入了老大哥的概念。