1.
If he ignores this, he himself will be ignored.
若有不知道的、由他不知道罢。
2.
I know something you don't know!
我知道一些你不知道的事情!
3.
Never am I ashamed to confess my ignorance of what I do not know.
(因此)我是不知道的事就承认说不知道，并不害羞。
4.
Nor am I ashamed to confess my ignorance of what I do not know.
因此我是不知道的事就承认说不知道，并不害羞。
5.
Not aware or cognizant.
未意识到的，不知道的
6.
A crisis unbeknown to us.
我们所不知道的危机
7.
A: No, I didn't know that.
甲：啊，我本来不知道的。
8.
Well, I do not know really .
噢，我真的不知道。
9.
Really? I do not know .
真的？ 我还不知道。
10.
Really? I didn't know.
真的？我可不知道。
11.
You don' t know his address, neither do I.
你不知道他的地址，我也不知道。
12.
I'm sorry, I really don't know.
对不起，我真的不知道。
13.
I wonder if I have enough credit.
不知道我的学分够不够
14.
THE TAO CANNOT BE TOLD SUCCESSFULLY, BUT CAN BE PERCEIVED BY INTUITION--THE TAO OF PERCEPTION OF IMPERCEPTION;
不可“道”之“道”借言而“悟”之——《庄子》的“不知之知”的“道”
15.
I don't know. I know as much as you, OK?
不知道,我和你知道的一样多,好吗?
16.
I know the tune of the song, but I don't know the words.
我知道这首歌的曲调，但我不知道歌词。
17.
Do you know how the phrase come about?
你知道不知道这个成语是怎样产生的？
18.
Feeling-of-Knowing (FOK) and Feeling-of-not-Knowing (FOnK): An Experimental Disassociation;
知道感(FOK)和不知道感(FOnK)的实验分离