由于时代的久远和知识的匮乏，先民基于对虹的想像认为虹是双首龙，先民观念中的虹与远古龙蛇类动物图腾崇拜有着密切的关系。
Because of the remote era and deficient knowledge, the people lived in ancient times believed that the rainbow was dragon with two heads on the basis of their imagination.
这些功能和内涵主要表现为实用与审美装饰、原始巫术、动物崇拜和图腾崇拜等方面。
Such functions and contexts were mainly revealed in purposes of practical usages, artistic decoration, primitive witchcrafts, animal worships, and totemic worships, etc.
而图腾文化的式微、动物崇拜思想的衰落、中土儒、道、释等思想的浸染，正是促使其变迁的文化因素。
The wane of the totem culture, the decline of the animal worship and the influence of the ideas of Ru, Dao and Shi in central China were the cultural factors that lead to the changes.
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