castes社会等级casten.印度的世袭阶级；(排他的)社会团体；种姓；等级制度Castellani's absorption butter二硫化碳中毒Castellan Zhu will come soon.城主朱将会很快来。Caste lines formed automatically阶级内部的等级自然而然地形成了。Castellani's agglutinin-absorption test留碳操作