translation.en: We identified five design conditions that belonged to the hard half of a house, and we went back to the families to do two things: join forces and split tasks.
translation.zh: 我们确认了五个设计条件， 它们都属于建造一座房子中困难的那部分， 然后我们回头找到那些家庭去做两件事： 联合力量和分派任务。