serve two ends的用法和樣例：
例句
用作不及物動(dòng)詞 (vi.)
- The transformation was intended to serve two purposes.
這種大變活人的活動(dòng)是要達到兩個(gè)目的。 - Homeland Security Secretary Janet Napolitano says the United States has two objectives in boosting security along the border with Mexico.
美國國土安全部長(cháng)納波利塔諾說(shuō)，美國加強美墨邊境的安全是為了達到兩個(gè)目的。
