This theory was born of the observation that other galaxies are moving away from our own at great speed, in all directions, as if they had all been propelled by an ancient explosive force.

这个理论诞生于对其他星系的观测，他们在各个方向上以极高的速度远离我们的星系，好像都被某个古老的爆炸性力量推进着。

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The design and test results of the new type high-subsonic speed submerged and semi-submerged intakes for cruise missile propelled by a turbojet engine have been introduced.

本文介绍了以涡轮喷气发动机为动力装置的飞航式战术导弹的一种新型高亚音速嵌入式、半嵌入式进气道的设计与试验研究结果。

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It was only a short burn lasting about 16 seconds, but it propelled SS2 beyond the sound barrier to a speed of Mach 1.2.

BBC: Science correspondent, BBC News

The nerves that activate a squid's jet-propelled escape mechanism have particularly big axons, allowing signals to travel at great speed.

ECONOMIST: Andrew Huxley | The

Experiments measured the forces and acceleration of a regulation, adult-size-5 ball propelled repeatedly at a magnesium dummy-like head at 18 meters per second, which is considered the average speed a ball is kicked by nonprofessional players.

WSJ: Soccer 'Header' Impact Likened to Hard Punch