Hetian jade have no gradational distinction , but is divided into mountain and river materials according to the geology source .

和田玉没有等级区分，但根据地质出处分为山料和籽料。

Accompany global region economy to develop by liu yu to maritime space gradational advance , the world each upsurge that coastal state greeted marine economy to develop .

伴随全球性区域经济发展由陆域向海域的渐次推进,世界各沿海国家迎来了海洋经济发展的热潮。

The library institution includes three levels which are macroscopic , mid - gradational and microcosmic respectively .

图书馆制度包括宏观、中观和微观三个层面。

Firstly , this thesis found general price guarantee model . Then , considering consumer 's different price prospects to the same product , we extend the general price guarantee model to gradational price guarantee model .

本论文先建立了一般的价格保护策略模型，考虑到消费者对产品未来价格下降的不同预期，又在一般价格保护策略模型的基础上，扩展建立了划分等级的价格保护策略模型。