The academic had described the interaction between ethnic groups and the mathematical model by mathematical tools for a long time.For example, Lotka and Volterra established the 2D competition model.

• 近年来购车低利率及零利率的方案盛行，越来越多人在购买汽车时一改以往的一次付清，开始使用分期摊还的方式来购车。