偶然性的用法和样例：
例句
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模态逻辑命题的限制条件，建立在其内容的肯定或否定其可能性，不可能性，偶然性或必然性基础之上
The classification of propositions on the basis of whether they assert or deny the possibility, impossibility, contingency, or necessity of their content. -
偶然性取决于机会的情形；不确定性
The condition of being dependent on chance; uncertainty.
