The story goes that 故事是这样的，据说，传说

【例句】
The story goes that a mysterious animal lives in the mountain.
据说山里有一个神秘的动物。

The story goes that during the Roman empire, there was an incredibly beautiful maiden named rhodanthe.
据说在罗马帝国时代，有一个名叫罗丹斯的美丽绝伦的少女。