translation.en: And he came out and, within a day, it worked out that most dust in this community was within a meter of the ground, the wind-driven dust -- so he suggested making mounds to catch the dust before it went into the house area and affected the eyes of kids.
translation.zh: 然后他来帮忙，花了不到一天的时间 发现这个社区里的大多数灰尘 集中漂浮在距离地面一米的范围内，属于风动灰尘， 于是他建议用造土堆的方法 来阻挡灰尘飘进居住区域 去影响孩子们的眼睛。