He muffed his opening speech.

他的开幕讲话搞砸了。

柯林斯例句

He muffed a good opportunity for a big contract.

他把签订一项大合同的好机会错过了.

辞典例句

I had a chance to impress her with my efficiency and I muffed it up.

我本来有机会使她了解我的办事效率,但是我错过了这个机会.

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