U C 可能性，可能发生的事 the likelihood,chance that sth will or did happen
C 概率 the chance of an event happening,expressed as a calculation based on known numbers
常用短语
in all probability 十之八九，很可能almost certainly
In all probability she will arrive in time for dinner.她十有八九会按时来吃饭的。
句型例句
The probability that it will rain today is high.今天下雨的可能性很大。
There is a 50% probability that the population will be infected with the disease.民众感染这种疾病的概率为50%。
