duck是不是可数名词

　　duck用作名词的用法例句

　　The special today is pressed duck with walnuts.今天的特色菜是桃仁酥鸭。

　　They visited a duck farm operated by the corporation.他们参观了这个公司办的养鸭场。

　　You cannot teach an old duck new tricks.老鸭学不会新把戏。