So Player I's payoff, if she chooses top and Player II chooses center, we read by looking at the top row and the center column, and Player I's payoff is the first of these payoffs, so it's 11.

参与人I的收益,如果她选上,参与人II选中,我们来看一下上行和中列,参与人I对应第一个收益即11

耶鲁公开课 - 博弈论课程节选