Father and son did not talk or even look at each other.

VOA: special.2009.03.07

Look around each other. You better get to know each other a bit.

互相看一下吧,你们最好多互相了解下

耶鲁公开课 - 博弈论课程节选

So, look at each other expressionless.

请面无表情地互相看。

耶鲁公开课 - 心理学导论课程节选