战国时代发明了可以双箭齐射的连弩，提高了发射速度。

Repeating crossbow which could launch two arrows at a time was invented during the Period of Warring States.

youdao

惠普和IBM已经深谙卖硬件和提供IT服务的平衡之道，它们将双箭齐发。

HP and IBM, already used to the balancing act of selling hardware and providing IT services, will try to do both.

youdao

我们再看一个成语：一举两得/一箭双雕。

Let us look at an idiom: kill two birds with double-edged sword.

youdao