ㄅㄞˊbáiㄘㄤcāngㄍㄡˇgǒu

  1. ·杜甫可嘆天上浮雲白衣斯須改變。」比喻世事變幻無常拍案驚奇·》:東海揚塵有日白衣蒼狗剎那。」白雲蒼狗」、白雲」。

lit. (cloud shapes)​ changing from a white shirt to a gray dog (idiom)​, fig. the impermanence of all things