Accidents have characteristics of contingency, inevitability and preventability. Fully realization of these characteristics is of great significance in raising the level of safety awareness.
事故的发生具有偶然性、必然性和可预防性等特性，充分认识事故的这些特性对提高安全意识水平有重要的意义。
Philosophical thought that towards fate and dialectical understanding towards contingency and inevitability are the embodiments of the fatalistic feeling existing in Wang Anyi's subconscious.
对命运的哲学思考、对偶然性与必然性的辩证认识，这是王安忆潜意识中存在宿命感的体现。
The contingency and inevitability belong to the category of materialist dialectics, the statistical method is a kind of mathematical methods.
偶然性、必然性属于唯物辩证法的基本范畴，统计方法是一种数学方法。
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