潜心涤虑

Explanation: That dedication. 　　Source: Liang, "Evolution and the theory of learning and the beginning of Zul text slightly Biography" [Darwin] thousands of forty-two years, then went to London, Buju special province near Beijing, one in the village, Ping pull vulgar, devote themselves to wash into account, the marine the materials found within five years, said the enlightenment of the new, clean it, exercise it. "