uncertainties
n. [数]不确定性；不确定因素（uncertainty 的复数）
例句
On the day her son began school, she meditated on the uncertainties of his future.
在她儿子入学那天，她深思了有关他未来的种种不确定因素。
《柯林斯英汉双解大词典》
Researchers studying how genes control animal behavior have had to deal with many uncertainties.
研究基因如何控制动物行为的研究人员不得不面对许多不确定因素。
Terrorism, economic uncertainties and general feelings of insecurity have increased people's anxiety.
恐怖主义、经济不确定性和普遍的不安全感增加了人们的焦虑。
