smoke screen
柯林斯词典
1. N-COUNT If something that you do or say is a smokescreen, it is intended to hide the truth about your activities or intentions. (掩盖行动或真实意图的)烟幕; 幌子
He was accused of putting up a smokescreen to hide poor standards in schools. 他被指故意放烟幕掩盖学校教育水平的低下。
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