Musashi's eight principle states, " Never let yourself be saddened by a separation."

武藏的第八条原则是，“永远不要让自己因分离而悲伤（离别之时亦不伤悲）。”

It's broken down into mostly eight principle crystal types including dendrites, columns and irregular forms.

雪花主要被分为八种主要晶体类型，其中有树突状、柱状和不规则形状。

Yin and yang are the general principles among the eight principles. In diagnosis, all diseases can be generalized into either yin or yang according to the clinical manifestations.

阴阳是八纲的一般原则。在诊断中，所有疾病可根据临床表现，可归纳为阴或阳。

The eight principles refer to yin and yang, exterior and interior, cold and heat as well as deficiency and excess. The manifestations of diseases, though complicated, can be generalized into certain patterns in the light of the eight principles.

八纲是指阴阳、表里、寒热、虚实。疾病的表现尽管及其复杂，但基本上都可以用八纲加以归纳。