Impermanency
n. 非永久, 非永久性, 暫時, 暫時性
??? 情景例句
Then I've solved your problem.
說來我替你解決問題了。
How long will it take you to repair it?
你要多久才能修好它？
It is clear that the cat has eaten it!
很明顯，是貓偷吃的！