n.不確定；不可靠；易變

The uncertainty is unbearable! 事情定不下來真讓人難以忍受！

There was a note of uncertainty in his voice. 他的話帶有不確定的調(diào)子。

They lived in the uncertainty on the dole. 他們依靠救濟(jì)金的生活不安定。

Man lives in a world of uncertainty. 人類生活在一個變化多端的世界上。