First, I'll explain the rules of the game.

首先我要说明一下游戏规则。

《牛津词典》

It was difficult to explain the problem to beginners.

对初学者解释这个问题很难。

《牛津词典》

I had met with him to explain the format of the programme and what we had in mind.

我已经同他见过面，解释了这个节目的程式和我们的想法。

《柯林斯英汉双解大词典》

It would be impossible to explain the entire debate, so we will just tell a few stories about some great artists.

VOA: special.2010.04.14

Scholars have proposed three possible models to explain the formation of Israel. The first is an immigration model.

学者们提出了三种可能的模型,来解释以色列的形成，第一种是移民模式。

耶鲁公开课 - 旧约导论课程节选

Could you explain the difference you saw between your university in your hometown and here?

你能解释一下你看到的你家乡的大学和这里的大学的区别吗？

做交换生来到这里 - SpeakingMax英语口语达人

Then they explain the bizarre name of the company, just in case the customer is confused.

FORBES: The Profit Givers

Spend the night at the bottom of the Grand Canyon with an astronomer who can explain the stars.

BBC: The bloom of cancer

How else to explain the endless Treasury rally and the full-scale retreat from equities?

FORBES: Price Before Volume, Horse Before Cart