Impermanency
n. 非永久, 非永久性, 暂时, 暂时性
🗣️ 情景例句
Sorry to trouble you, do you have these shirts in any other colors?
麻烦你了，你们有其他颜色的这种衬衫吗？
A friend is never known till a man have need.
不到患难时，永远不能认识真正的朋友。
that a series of deep soundings was obtained in the Atlantic and the first samples were collected by dredging the bottom.
才在大西洋测得一个个海水深度，同时通过挖掘海底，取得了研究海底的首批样品。