I'm sorry I can't explain to you the reason.

对不起，我不能向你解释原因。

youdao

"I can't explain MYSELF, I'm afraid, sir," said Alice, "because I'm not myself, you see."

“我恐怕说不清，先生。”爱丽丝说，“因为我不是我自己，您知道的。”

youdao

I can't explain such a statement by him on the basis of logic. He must have blown his top.

我从逻辑推理方面解释不了他讲的这番话，他想必是神经错乱了。

《新英汉大辞典》

I can't explain this because classical physics doesn't work at atomic dimensions.

我不能解释这个,因为经典物理在不适用,就原子尺度而言。

麻省理工公开课 - 固态化学导论课程节选

Let's look at some patterns that will explain in more detail how we can use the "I can't" pattern.

下面让我们来看一些句型，它们会更具体地解释我们应如何使用“I can't”句型。

I can't 课堂 - SpeakingMax英语口语达人

And if the best the soul theorist can say is, "I can't explain it and neither can you," that's not a reason to believe this side.

如果灵魂理论者最多只能说,我不能解释,你也不能,这不是一个相信灵魂存在的理由

耶鲁公开课 - 死亡课程节选

"I can't explain why the girls think I'm cute, " Mr. Jones told People in 1985.

WSJ: Monkees Singer Davy Jones Dies at Age 66

"I can't explain how happy I am right now, " said Ben Canete, a 32-year-old Filipino, jumping up and down in excitement.

NPR: Argentine Jorge Bergoglio Elected Pope Francis

"I spoke to the players and I can't explain it, " he said.

BBC: Burley not under threat, says SFA