Exacto爱山吐牌手表exactadj.精密严谨的；确切的exact and conveniences准确和简便Exact Quadratic Search精确二次搜索exact confidence limit精确置信限exact conditional test精确条件检验exact penalty function恰当惩罚函数exactitude instruments精密器械exact soliton solution精确孤子解exact payment of sb.逼某人付款Exact dynamicstiffness精确动力刚度exact additive functor正合加性函子