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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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

The striker had time to control the ball, but instead opted for the spectacular with an overhead kick, firing wide of Kirkland's left-hand post.

BBC: CHOOSE A SPORT

When democratic revolutions swept across Eastern Europe, it was the steady diplomatic hand of President Bush that made possible an achievement once thought impossible -- ending the Cold War without firing a shot.

WHITEHOUSE: 2010 Presidential Medal of Freedom Ceremony