相机而动

Explanation: Observation time, see the appropriate opportunity to act now. 　　Source: "Ten year of Duke Yin Zuo," Xu was no penalty and cutting it, and the homes of service, degree of virtue and the Department of and capabilities of, the phase alternation of generations not tired, can be described as polite carry on. " Thesaurus:  take such measures as one suitable to local conditions, cut one'scoataccording to one's cloth, shutter walk, When in Rome do as the Romans do., Actually cut into the question, Asked the customs entry, Into the state asked the customs, When in Rome do as the Romans do., when in Rome do as the Romans do, Shenliqianjie