The K21 can travel as fast as 70 kilometers per hour on paved roads and cross a river at a speed of 7.8 kilometers per hour with the help of its water-jet propulsion system.

K21可以以每小时70公里的速度在铺设的道路上行驶，喷气推进系统能每小时加速7.8公里，以这速度可以穿越过一条河流。

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According to Environment America, high-speed rail USES a third less energy per mile than auto or air travel, and a nationwide system could reduce oil use by 125 million bbl. a year.

根据美国环境署资料，高铁和汽车或者飞机相比每公里使用能源最少，而一个全国范围的系统将能每年减少使用1.25亿桶的石油。

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Virtual test of towed gun travel on enhanced road surface was carried out. Natural frequency of towed gun suspension system must be calculated firstly so as to ensure safety towed test speed.

对火炮在强化路上牵引进行了虚拟试验，为了确定安全的牵引试验速度，必须首先计算火炮悬挂系统的固有频率。

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Congress has since overwhelmingly approved a measure to get the air travel system up to speed again after the delays provoked a round of the blame game on Capitol Hill, with conservatives accusing the president of "playing politics" with these particular cuts.

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Since the primary waves travel more quickly than the comparatively sluggish secondary waves, the system picks up on the magnitude and speed at which the quake is approaching, and beams the data over fiber optic networks to emergency relay stations setup in corporate towers, governmental buildings, hospitals, and transportation venues such as railways.

ENGADGET: Japan Meteorological Agency develops earthquake warning system