Definition: by chance or by mistake Level: B2
她不小心打翻了一杯水。
She ___accidentally knocked over a glass of water.
我不小心打碎了你的一个花瓶——最漂亮的那个。
I ___accidentally broke one of your vases - the most beautiful one.
他不小心把邮件发错了人。
He ___accidentally sent the email to the wrong person.
