Two broadclasses of arthritis are recognized: primary (idiopathic or unknown) and secondary.
两个班的关节炎广泛认可：初级(特发性或未知)和次要的。
2
It reflects the community in the middle and lower classes of society, a broad, deep and detailed description of the lives of people of middle and lower classes, unique in the classical novels.
它反映社会中下层的社会生活，以广泛的、深刻的，细致的描述下层人民的生活面，在古典小说中独树一帜。
3
Because of this, he contacts many with the lower classes, the aspect of knowledge is broad, he said: "I little also inexpensive, therefore many can the vulgar matter."