accidentally

I accidentally deleted the important email while trying to clear my inbox.

(Chinese) 我在清理收件箱时，不小心删掉了那封重要的邮件。

He accidentally bumped into the vase, causing it to fall and shatter on the floor.

(Chinese) 他不小心撞到了花瓶，导致花瓶掉在地上摔碎了。