唉，你知道，这很难解释。

Well, you know, it's difficult to explain.

《牛津词典》

友希摇了摇头。“那是一个不同的时代。这很难解释。”

Yuki shook her head, "That was a different time. It's hard to explain."

youdao

这是一种归属感，友谊感，这很难解释。

It's kind of a sense of belonging, a friendship, it's hard to explain.

youdao

It's hard to explain. I'm not an expert, so I just...

这很难解释。我不是一个专家，所以我只能……

英国的啤酒 - SpeakingMax英语口语达人