每日商務英語 第555期:完全反對

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to be dead set against something------完全反對（成語）

英文釋義
(IDIOM) To be completely opposed to something.

例句
My grandfather is dead set against flying in airplanes, so we have to travel by train when we take him on a vacation with us.
我的祖父堅決反對坐飛機，所以帶他去度假的時候，我們只能坐火車出行。