No comment. I don't know anything.

无可奉告。我什么也不知道。

《柯林斯英汉双解大词典》

Sheepishly, the client says "I don't know what I should keep or delete, so I never move anything out of my inbox" (no wonder they can never find anything).

客户羞答答地对我说“我不知道我是该保存还是删除，所以我原封不动。”(如此一来他们找不到重要邮件便不足为奇)。

youdao

Alice: no, I don't. I don't know anything about the 17th century.

艾丽斯：不，不知道。我不知道十七世纪的任何事情。

youdao

I was just finding very tunnel vision-like, the smallest elements at that moment in time which means I don't know anything about the other elements other than they are not the smallest and so no matter what with Selection Sort I had to repeat this again and again and again and if you do out the math it's roughly N squared steps in the worst case as well.

我只有一个狭窄的视野，只知道某时刻的最小元素,就意味着我并不知道其他元素的任何情况,只知道它们不是最小的,所以不管怎样，在选择排序中,我就得一遍一遍地重复选择过程,在最坏情况下,大概需要N的平方次比较。

哈佛公开课 - 计算机科学课程节选