"I'm certain I don't recall." Baker shrugged her shoulders.

“我确定我不记得了。”贝克耸耸肩说。

金山词霸

Yes, I remember the street name.

是的，我记得街道名称。

金山词霸

I don't know what he has done, he just bumbles through life.

我不知道他做了些什么事, 他简直是在混日子.

《简明英汉词典》

I've had dealings with the lady, but I don't know her well.

我和这位女士有过交往, 但对她不很了解.

《简明英汉词典》

There's something afoot here, but I don't know what it is.

这里有什么东西不对劲, 但我不知道到底是什么.

《简明英汉词典》

I don't know the writer, but I know of him.

我不认识这个作家, 但我听说过.

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I don't know, and for that matter, I don't care.

我不知道, 对此我也不在乎.

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I don't know the cause of his abrupt leave.

我不知道他突然离去的原因.

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I don't know anything about what happened, I swear.

我发誓, 我对所发生的事一无所知.

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I don't know how I managed to swallow my anger.

我不知道怎样才能抑制住我的愤怒.

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I don't know why he held his cards close to his chest.

我不知道他为何一直守口如瓶.

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I don't know how she manages to live off her painting.

我不知道她怎么能以画画为生.

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I don't know why I feel so fed up this morning.

我不知道为什么今天上午情绪这么低落.

《简明英汉词典》

I don't know how my story caused so much laughter.

我不知我的故事怎么引起如此大笑.

《简明英汉词典》

I don't know how to put that into English.

我不知道怎样把它译成英语.

《简明英汉词典》