Sometimes life doesn't seem to play fair.

生活有时候似乎不公平。

But over time, gratitude became more than just an impulse to play fair.

但是随着时间的流逝，感激已不是共存概念那么简单了。

You think the other side is going to play fair this time?

你认为这次对方会公平竞争吗？

Roasting the pig's tail was such fun that it was hard to play fair, taking turns.

轮流。

But why would you work with me if you don't think I'm going to play fair?

但如果你认为我不会公平竞争，你为什么要和我一起工作？

" To play fair" (fair) is to be honest – not to do anything mean or dishonest in dealing with other people.

“To play fair”（公平）就是诚实——在与他人打交道时不做任何刻薄或不诚实的事情。