一箭双雕

南北朝时代，有个名叫长孙晟的人，聪明敏捷，特别善于射箭。一天他同朋友一起去打猎，忽然看见两支雕在空中争夺一块肉。他的朋友立即给了长孙晟两只箭，说：“你能把两只雕都射下来吗？”长孙晟不慌不忙拉开弓，只射了一箭，就把两只雕同时射下来了。朋友直夸他好箭法。

这个成语比喻用一种办法同时得到两种收获或效果。

Killing Two Birds with One Stone

In the period of the Northern and Southern Dynasties(420-589) there was an expert archer named Zhangsun Sheng. One day he went hunting together with a friend. Suddenly they saw two vultures fighting for a piece of meat high in the air. His friend handed him two arrows, and said, “Can you shoot down both vultures?” Zhangsun Sheng effortlessly killed both vultures with only one arrow.

This idiom indicates achieving two things with one stroke.