sacred cow

1. N-COUNT If you describe a belief, custom, or institution as a sacred cow, you disapprove of people treating it with too much respect and being afraid to criticize or question it. 神圣不可質(zhì)疑的事物[表不滿]

Public schools are often viewed as infallible sacred cows. 公立學(xué)校常被認(rèn)為是批評(píng)的禁區(qū)。