chancen.可能性；机会；偶然性v.偶然发生；碰巧；冒 ... (的险)chance constraint机会约束chance impression偶然的印象chance of success成功的机会chance probability机遇概率chance correlation偶然相关chance of a profit随机利润chance of survival生还机会chance fluctuation机遇波动chance rate theory概率论chance constraints机会约束