我们常常在不同的场合，以不同的方式来描述偶然性：偶然性 是事物外部的次要原因引起的结果 “， 是由非根本矛盾和外部条件造成的”， 是必然性的表现形式和补充“， 偶然性对事物的发展只起加速或延缓作用 ”。以上描述，不仅仅在语言文字上有差异，而且代表了偶然性形成的不同 We often describe the contingency on different occasions and in different ways: contingency is the result of a secondary cause external to things, “caused by non-fundamental contradictions and external conditions,” and is a manifestation and supplement of necessity. “Occasionally only accelerates or delays the development of things.” The above description, not only in the language differences, but also represents the formation of the difference by chance