tourist:
what are those ducks quacking for? 

那些鸭子正在做什么呢?
dragoman:
maybe they are praying for their own life! 

也许他们正在为自己祈祷呢!
tourist:
why? 

为什么
dragoman:
because of them may become intraday bejing duck in your dish! 

因为他们中的一个可能会成为你们盘中北京烤鸭!
tourist:
hahahahah.............. 

旅客大笑。