最后，第四只鸭子快速地飞过。这次是外科医生把猎枪对准了天空。

Finally, a fourth fowl sped past and this time the surgeon's weapon pointed sky wards. BOOM! The surgeon lowered his smoking gun and turned nonchalantly to the pathologist beside him.

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第二只鸟飞过头顶，有福不在忙医生对着鸟类图谱看了看说：恩，绿色的翅膀，黄色的嘴，嘎嘎的叫声…应该是只鸭子。

The next bird flies overhead, and the pathologist looks at it, then looks through the pages of a bird manual, and says, "Hmmmm … green wings, yellow bill, quacking sound … might be a duck."

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