n.不确定；不可靠；易变
The uncertainty is unbearable! 事情定不下来真让人难以忍受！
There was a note of uncertainty in his voice. 他的话带有不确定的调子。
They lived in the uncertainty on the dole. 他们依靠救济金的生活不安定。
Man lives in a world of uncertainty. 人类生活在一个变化多端的世界上。
