"印度的世袭阶级" can be translated into English as "the hereditary castes in India" or more commonly and concisely as "the Indian caste system" (when referring generally to the hierarchical social structure based on heredity in India, though strictly speaking "caste system" encompasses broader aspects including occupations and social interactions). If specifically emphasizing the hereditary nature of the classes, "the hereditary social classes in India" is also a valid expression. Among these, "the Indian caste system" is the most widely recognized and used term in English.