A hand-driven machine gun, the Gatling gun was the first firearm to solve the problems of loading, reliability, and the firing of sustained bursts.

早期的盖特机炮虽然要靠手摇才能开火，但它毕竟是同时解决了装弹、稳定性、连续开火问题的首款火力武器。

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PowderMed caught Pfizer's eye because of its nifty helium-powered, hand-held device that delivers vaccines by firing DNA-laced gold particles into the skin.

默沙东之所以看中PowerMed，就是因为后者灵巧的氦动力手持装置，它可通过将附有DNA的金颗粒发射入皮肤来接种疫苗。

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The intention of this article is to analyze the distinguishing features of motion of hand-held shoulder arm under firing and to introduce a feasible system for measuring this motion.

本文阐述了手提式肩射武器射击时运动测量的特点，介绍了一种可行的肩射武器运动测量系统。

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My left hand was firing on Friday and I had three good victories.

BBC: What next for Audley Harrison?

When the ball was turned back into the box by Burke, Ferguson was even more blatant in controlling the ball with his hand before firing home sublimely on the turn from 15 yards.

BBC: Rangers 2-0 Hearts

But Arsenal did go ahead when Walcott ran onto Gilberto's wonderful defence-splitting pass before firing home into the right-hand corner.

BBC: Sunderland 0-1 Arsenal