Exacto爱山吐牌手表exactadj.精密严谨的；确切的exact simulation model精确模型exact homotopy sequence正合同伦序列Exact transfer function准确传输函数exact localizing system正合局部化系统exact graph isomorphism精确图同构exact differential form恰当微分形式, 恰当微分型exact multicollinearity精确多重共线性exact soliton solutions精确解Exact body shape method精确形体法exact analytic solution精确解析解