Definition: the state of being uncertain Level: C1
关于他是否会参加活动，存在很多不确定性。
There was a lot of ___uncertainty about whether or not he would attend the event.
生活充满了不确定因素。
Life is full of ___uncertainties.
基本商品的短缺使我们的生活充满了不确定性。
Shortages of basic goods have made our lives full of ___uncertainty.
