That will be the day.

总会有一天的.

口语例句

But yeah, that will be the day!

不过是啊, 那将是个了不起的日子!

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If you win the lottery, that will be the day I become the president.

如果你能中彩票, 我就能当总统.

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Kevin: That will be the day ! My boss is such a notorious penny pincher.

凯文: 那是不可能的. 我的老?可是出了名的小气鬼.

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