According to reuse principles, classify principles, standardization principles in the course of establishing the reusable class, a model of reusable class and methods of establishment are given.
依据可复用类建立过程中所遵循的复用原则、分类原则、标准化原则，给出了可复用类的基本模型和建立方法。
Scientists in China are calling for improvements in earthquake prediction, including the establishment of an early-warning system and methods for scientists to share quake information.
中国的科学家们呼吁改进地震预报手段，其中包括建立早期预警系统以及制定科学家分享地震相关信息的方法。
Meantime, the concrete measures were elicited for bull selection, making and preservation of frozen semen, mating methods and frozen embryo pool establishment etc.
同时，从种牛选择，冻精制作与保存、选配方法、建立冷冻胚胎库等方面提出了具体技术措施。
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