serve two ends

• vi. 达到两个目的(一举两得)

serve two ends的用法和样例：

例句

用作不及物动词 (vi.)

1. The transformation was intended to serve two purposes.
   这种大变活人的活动是要达到两个目的。
2. Homeland Security Secretary Janet Napolitano says the United States has two objectives in boosting security along the border with Mexico.
   美国国土安全部长纳波利塔诺说，美国加强美墨边境的安全是为了达到两个目的。