luck改一个字母变成一种动物（luck花体符号）

单词是duck，意思是鸭子，例如：

1.The cat was now within striking distance of the duck.此时，猫就在可攻击鸭子的距离内。

2.Ducks were swimming around on the river.鸭子在河面上游来游去。

3.A duck's feathers shed water immediately.鸭子的羽毛不沾水。