HSK 7-9
不慎
búshèn形
incautious; inattentive
他不慎把咖啡洒在文件上。
Tā bú shèn bǎ kā fēi sǎ zài wén jiàn shàng.
He accidentally spilled coffee on the document.
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Appears across levels (7-9) in the HSK 3.0 word list.