I don't know how to explain.

我不知道该如何解释。

youdao

I don't know how to explain my gratitude.

我简直不知道怎么感谢您才好。

youdao

I'm happy, but I don't know. I don't know how to explain it.

我很开心，但我还是说不清楚，我不知道怎样来描述。

youdao

I'm defending, I'm defending the physicalist by saying, "Don't blame us. We don't know how to explain it yet."

说我在辩护,当我给物理主义者辩护时我会说,别怪我们,我们还不知道怎么解释呢

耶鲁公开课 - 死亡课程节选

Why aren't I allowing the soul theory to say, "Don't blame us. We don't know how to explain it yet."

而又为什么不允许灵魂理论说,别责怪我们,我们只是还不知道怎么去解释

耶鲁公开课 - 死亡课程节选

"I don't know how to explain it, " Mr. Foxman said.

WSJ: Hikind Apologizes for Blackface Costume

"I don't know how to explain what it was like to run my business, the joy of every day, " she told Vanity Fair magazine in a story in 2003.

WSJ: Lilly Pulitzer, Socialite, Designer, Dies at 81

"I don't think either of us know how to explain what it feels like to win this, " said Farquharson.

BBC: Wimbledon 2010: GB's Broady and Farquharson take title