唉，你知道，这很难解释。

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

《牛津词典》

当有人问“现在在忙什么”时，你不知怎么回答，因为这很难解释。

When someone asks, "What are you working on?," you stumble, because it is hard to explain.

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更严重的是，其他人会对你没有参与做惩罚：“嗯，这种玩笑很难解释。

Worse, other people will punish you for missing out: “Oh, yeah, the joke is kind of hard to explain.

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