swan和duck的区别（swan怎么过冬）

swan是天鹅的意思，而duck则是鸭子的意思，区别可以从以下例子看出：

These are swan, they are bigger than the duck, also swan is precious , it will not be many swim around like duck. 这些是天鹅，它们比鸭子还大，而且天鹅也很珍贵。 它不会像鸭子一样游来游去。