be flat out:很忙
Kyle: It's lunch time. You want to go grab a bite to eat?
午饭时间到了,你要吃点什么吗?
David: Thanks, but I can't right now - I'm flat out...
谢谢,但现在不行,太忙了.
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午饭时间到了,你要吃点什么吗?
David: Thanks, but I can't right now - I'm flat out...
谢谢,但现在不行,太忙了.