黑天鹅孵化期多长（天鹅与家鹅）

A certain rich man bought in the market a goose and swan.He fed the one for his table and kept the other for the sake of its song.When the time came for killing the goose,the cook went to get him at night,when it was dark,and he was not able to distinguish one bird from the other.By mistake he caught the swan instead of the goose.This one threatend with death,brust forth into song and thus made himself known by his voice, and preserved his life by his melody.

一个有钱人在集市上买了一只家鹅和一只天鹅。他买家鹅是用来吃肉的，而天鹅是为了欣赏她的歌喉。到了该宰杀家鹅的时候，厨师跑去捉它，可是天太黑他分不清哪一只是天鹅，哪一只是家鹅，结果错把天鹅给捉住了。天鹅吓坏了，以为死期已到，悲哀的鸣叫起来，却没想到这样一来，厨师辨别出天鹅的声音，就把她给放了，天鹅用自己的歌声挽救了自己的性命。