哇，窗口太小啦
请调整浏览器窗口大小或者请使用手机查看！
In a radical experiment that explores racial segregation, pupils from schools in very different areas swap places.
请调整浏览器窗口大小或者请使用手机查看！
In a radical experiment that explores racial segregation, pupils from schools in very different areas swap places.
