I 'll never know what, made you run away.

我永远不会知道，是什么让你离开。

youdao

I "ll never know just what you meant to say...... to say."

我不知道怎样去形容…去形容你对我的意义。

youdao

"Longer than always" is a long, long time, but far beyond forever you 'll be mine. I know I never lived before, and my heart is very sure, no one else could love you more.

比永远更长久“是个很长很长的时间，然而我对你的爱却超过了永恒。”我知道我以前的生活没有什么意义，但此刻我心中却很确定没有人比我更爱你。

youdao

How it got into my pajamas I'll never know."

至于它怎么进来的,我就不知道了"

耶鲁公开课 - 心理学导论课程节选

I'll never know because I still value the functioning ability of my esophagus.

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I'll never know 100 per cent whether it was a detective, but I have my suspicions.

BBC: India's 'wedding detectives' enjoy booming trade

But what it was like spending months locked up behind barbed wire, I hope I'll never know.

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