to space something out 徹底忘記（俚語）
![每日商務英語 第247期:徹底忘記]( "每日商務英語 第247期:徹底忘記")
英文釋義
To forget something completely due to distraction, fatigue, or mental confusion.
例句
I have been so busy at work that I spaced out my mom's birthday, which is tomorrow, and I need to buy her a present.
我工作實在太忙，竟然忘了媽媽明天過生日，我必須給她買個禮物。
