It takes a long time for all the nations to unite as one country by surporting and learning from each other.
经过长期的互相帮助，相互学习，形成了统一的多民族国家。
Feature has different definition in different application, a feature modeling method surporting multiple feature transformation is discussed.
在不同的工程应用中对特征有不同的定义方法。
应用推荐