In fact, there is, there is going to be one.

事实上确实如此
So our exercise now is, let's find a mixed strategy Nash Equilibrium,

下面就让我们寻找混合策略纳什均衡
and before we find it, let's just interpret what it's going to mean.

开始前先讲一下它是什么意思
A mixed strategy Nash Equilibrium in this game,

这个博弈的混合策略纳什均衡
is going to be a mix for Venus

说的就是包含维纳斯
between hitting the ball to Serena's left and Serena's right,

从塞丽娜左侧进攻和右侧进攻
and a mix for Serena between leaning left and leaning right,

以及塞丽娜防左还是防右的混合策略
such that each person's mix, each person's randomization

该混合策略中每个参与人的随机化策略
is a best response to the other person's randomization.

都是另一个参与人随机化策略的最佳对策
Since these players are sisters and have played each other

由于她们两人是姐妹关系
many, many times, not just in competition but probably in practice,

而且在平时和比赛中已经有过多次交手
it seems like a reasonable idea

因此我们也不难想到