K-9：knock on the head 当头一击
A:I fail the final examination.
A:我期末考试没及格。
B:That's too bad.
B:太糟了。
A:What's worse is that my plan of a good vacation was knocked on the head.
A:更糟的是，我想好好度个假期的计划也告吹了。
B:What a pity!
B：真遗憾。
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