“我不知道。”她非常愤怒地说。

"I don't know," she said fiercely.

《柯林斯英汉双解大词典》

“我不知道他们为什么离开，”他悲伤地说。

"I don't know why they left," he said dolefully.

《柯林斯英汉双解大词典》

阿伦小姐对他笑道：“你很会猜， 我确实不知道你怎么办到的。”——杰姆斯说：“推论。”

Miss Allan beamed at him. "You are clever to guess. I'm sure I don't know how you did it."—"Deduction," James said.

《柯林斯英汉双解大词典》

I wonder have any of you reflected on, I don't want to call it shadow side, is not domesticated.

不知道你们有没有人想过这个问题，我不想说这是自然的阴暗面，无法驯化的一面。

普林斯顿公开课 - 人性课程节选

But for me, I like to look at something and just say, "I like this. I don't really know why though."

但对我来说，我喜欢看着某个东西，然后说，“我喜欢这个。但我也不知道为什么。”

关于现代美术 - SpeakingMax英语口语达人

- "She lived unknown and few could know"-- how can she be unknown if few know anything about her?

她不为人知地活着，鲜有人知道她“,如果有任何人知道关于她的任何事情,又怎么能说他不为人知呢？

耶鲁公开课 - 文学理论导论课程节选