We even balance equations on it.

我们甚至以对称形式保持等式。

But there's a balancing equation, because children control the audible space in the house.

但是有一个平衡方程式，因为孩子们控制着房子里的听觉空间。

So how do you do it? Not make a baby, balance an equation. I did biology last year.

你是怎么做到的？ 不生孩子，平衡方程式。 我去年学过生物。

We also learned how to calculate molar mass and how to balance a chemical equation and finally, we talked about how to use molar ratios to calculate the amount of stuff that goes in and out of a reaction.

我们还学习了如何计算摩尔质量以及如何平衡化学方程式， 最后，我们讨论了如何使用摩尔比来计算进出反应的物质的量。