impermanent
adj. 暂时的;非永久的
例句
We are reminded just how small and how impermanent we are.
我们刚被提醒,我们多么渺小,我们的生命又是多么短暂。
《柯林斯英汉双解大词典》
Oral communication is fast-moving and impermanent.
口头交流速度快但持续时间短。
Gudo smiled. 'Everything in this life is impermanent' he explained.
Gudo笑道:“世事无常,人生短暂。”