unascertained risk

• 未确知风险

unascertained risk的用法和样例：

例句

1. Because recklessness involves taking a known risk, eschewing knowledge of the danger probably averts a court case.
   因为重大过失涉及到冒已知风险的问题，如果风险未知，即不知道自己是否携带病毒，似乎可以免惹官非。