If expanded to heavy range, then, it also should include opportunity, accidentalfactor and so on.
如果再往大的范围扩展，那么，它还应该包括机遇、偶然等因素。
2
Categorization norm for human factor accidents and accidental signs and their statistical method are the bases for guaranteeing civil aviation flying safety.
事故与事故征候分类标准和统计方法是民航飞行安全的一项基础性安全管理内容。
3
The Chinese movie vision style characteristic's formation is not accidental, what behind it involves the very complicated humanities factor and the social factor.