The new intern had the effrontery to criticize the CEO's presentation in front of everyone.

那位新來的實習生竟然厚顏無恥地當著大家的面批評執行長的簡報。

The customer had the effrontery to demand a full refund after using the product for months.

那位顧客使用產品好幾個月後，竟然還有臉要求全額退款。

I can't believe the supplier had the effrontery to raise prices without notifying us first.

我不敢相信供應商竟敢在沒有事先通知我們的情況下擅自漲價。