It rains____and ______.(倾盆大雨)解释透彻点，为什么是猫和狗？？

《词汇短语起源故事百科全书》(Facts on File Encyclopedia of Word and Phrase Origins) 中收录了对其起源的一种解释。书中说“17世纪的英格兰在下大雨的时候，一些城市的街道就会水流成河，而且这些污水中还会飘浮着大量的死猫死狗。”（During heavy rains in 17th century England, some city streets became raging rivers of filth carrying many cats and dogs） 布鲁尔在其所著的《成语寓言大辞典》(Dictionary of Phrase and Fable)中说，这个短语起源于北欧：“在挪威的神话中，猫被认为可以影响天气。驾着风暴而来的女巫据说就是化身为猫的。” 而狗和狼则是风暴神欧丁的随从，其中狗是“风的象征”("In Norse mythology, the cat is supposed to have great influence on the weather Witches that rode on storms were said to assume the form of cats" Dogs and wolves were attendants to Odin, the god of storms, and the dog "is a signal of wind")。