Explanation: Originally described as a beautiful spring before the village, after the sudden emergence of a new metaphor good situation. Source: Lu Song "Tour Shanxi village" poem: "Wonder Whether mountain heavy water has a silver lining." Examples: Diplomacy may have a dampening news ... ... to a dramatic change. At that time, ~, and today some of the plans have become the natural thing of the past. ★ Mao Dun "exercise" three