每日商务英语 第701期:爽约

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to flake out ------------ 爽约，失职（俚语）

英文释义
(SLANG) To fail to keep an appointment, or to fulfill a duty or promise.

例句
My brother promised to play golf with me yesterday, but he flaked out, and so I played alone.
我兄弟昨天答应陪我打高尔夫球，但是他爽约了，所以我只好一个人去打。