knock down a peg
打倒一个钉子
以上为机器翻译结果，长、整句建议使用 人工翻译 。
His dream, like every other executive at every network but Fox, is to find a show that cannot only holds its own against American Idol, but finally knock it down a peg or two.
NPR: 'Idol' Delivers Ratings Power for Fox
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