oversight, carelessness
忘了带醋，是件丢脸的疏忽。
Forgetting to bring the vinegar was an embarrassing oversight.
他责备了我的疏忽。
He blamed me for my carelessness.
是个疏忽
It was an oversight.
— 美国黑帮 (2007)
是我的疏忽
It was my oversight.
— 趣味游戏 (1997)
是我的疏忽，抱歉。
That was my oversight. I'm sorry.