They are working together on homework for the first time as Girl Scout members.

VOA: special.2009.01.28

So rather than go through this again a whole third time, I've gone through it once in quantities and once in prices, I'm going to get you guys to do it this time by having you do it on a homework assignment.

与其从头到尾再做第三遍,我已经从产量和价格角度从头到尾做过了,我将让你们自己,在家庭作业中完成这个工作

耶鲁公开课 - 博弈论课程节选