probability

Compared meaning: the likelihood that something happens (noun).

比较义项：可能性（名词）。

• chance

  The everyday, informal word for likelihood, often paired with adjectives like 'slim' or 'good' and used in casual conversation rather than technical or statistical contexts.

  这是日常、非正式的“可能性”说法，常与 slim（渺茫的）、good（很大的）等形容词搭配，多用于日常对话，而非技术性或统计性语境。

  There's only a slim chance we'll finish the project by Friday.

  我们在周五前完成这个项目的可能性很小。

• probability 本词

  The more formal, often quantifiable term, common in statistics, science and forecasting, typically used with numbers or percentages rather than everyday adjectives.

  这是更正式、常可量化的说法，多见于统计学、科学研究和预测中，通常与具体数字或百分比连用，而不是日常口语中的形容词搭配。

  The probability of the disease spreading was estimated at 30 percent.

  这种疾病传播的概率估计为百分之三十。

Chance and probability can both mean the likelihood something happens. Chance is the everyday, informal word, often paired with adjectives like 'slim' or 'good'. Probability is more formal and quantifiable, common in statistics and forecasts, with numbers. Chance can mean 'an opportunity'; not compared here.

chance 和 probability 在这个义项上都表示“某事发生的可能性”，但 chance 更口语化、笼统，常与 slim（渺茫的）、good（很大的）等形容词搭配；probability 更正式、可量化，常见于统计学、科学研究和天气预报中，多与具体数字或百分比连用。这里不比较 chance 的“机会”义项。