translation.en: Also, we did focus groups with people who were on the ground with kids every day, like playground supervisors. We talked to them, confirmed some hypotheses and identified some serious questions about gender difference and play.
translation.zh: 同时我们对每天都和孩子相处的人进行了焦点小组调查 像操场的训导主任，和他们交谈， 确认了关于不同性别与游戏 的一些假设和严肃的问题。