we changed something fundamental about the game,

然后我们改变了博弈的一些要素
and we looked again to look at the new equilibrium,

之后我们又重新找到了均衡
that's called comparative statics.

这叫做比较静态分析
Let's talk through the intuition.

这次我们只用直觉来分析
Before we made any changes Venus was indifferent.

在改变之前维纳斯是中立的
She was indifferent between shooting to the left and shooting to the right.

她选择从左侧还是右侧进攻都一样
Then we improved Serena's ability to hit the volley to her left,

后来我们提高了塞丽娜反手截击的水平
we improved her backhand volley.

我们提高了她反手的水平
If we had not changed the way Serena played

如果我们没有进行这样的改动
then what would Venus have done?

那维纳斯应该怎么做呢
So suppose in fact Serena's Q had not changed.

假设塞丽娜的Q值没有变化
If Serena's Q had not changed,

现在塞丽娜的Q值不变