I don't know

基本解釋

I don't know how to resist my impulse.
我不知道怎樣抑制自己的感情沖動。
《新英漢大辭典》
I don't know why such new gifted people have sprung up in my life.
我不知道怎么回事，在我的周圍一下子涌現(xiàn)了那么多有才華的新人。
I don't know how these people go on for food when they are cut off by snow for days on end.
在連日下雪與外界隔絕的日子里，我不知道這些人是怎樣解決食物的。

But we certainly didn't have goals. I don't know if we had ever heard of Grammys at that point.
I don't know if you heard this morning, but there was news of the discovery of yet one more element.
我不知道你們今早聽說了沒，有一個新發(fā)現(xiàn),一個新的元素的發(fā)現(xiàn)。
麻省理工公開課 - 固態(tài)化學導論課程節(jié)選
And you've asked several people on the street . "I just can't get there! I don't know where I'm going!" and
你在街邊向幾個行人問路?！拔覜]法找到目的地了，我不知道該怎么走！”
How long課堂 - SpeakingMax英語口語達人

Mr. FAIUMU: Well, I don't know if there's actually any sound, particularly in our music, that's derivative.
NPR: Fat Freddy's Drop Blends Reggae, Soul And DJ Culture

used to express that you do not understand or are angry at something that someone has done