Player II has three choices left, center, and right, represented by the left, center, and right column in the matrix.

参与人II有三种选择,左中右,用矩阵的左中右三列来表示

耶鲁公开课 - 博弈论课程节选

This is the payoff to Player I of choosing Middle against Left.

这条线表示参与人I在对手选右时,选择左而获得的收益

耶鲁公开课 - 博弈论课程节选