纳污藏垢

Explanation: With the "water environment with dirt." Liang, "On the Origin of China's weakness," IV: "who are the most painful, not to the old disease, new disease complex, the day on deep product, pollutant reservoir scale, tame to the good doctor know what, Jiji be dead." EU Ju A "New Canton": "The private sector will also, the human heartbeat, the most complex flow of goods, possession of dirt for the pollutant of Chaoku."