that'll be the day idiom
（表示不太相信）胡扯，哪有那样的事
something you say in order to show you think that something is unlikely to happen
"Mike says he's going to give up smoking." "That'll be the day!" “迈克说他要戒烟了。”“别听他的！”
| 单词 | that'll be the day |
| 释义 | that'll be the day idiom （表示不太相信）胡扯，哪有那样的事 something you say in order to show you think that something is unlikely to happen "Mike says he's going to give up smoking." "That'll be the day!" “迈克说他要戒烟了。”“别听他的！” |
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