The Virginia-class Block III submarines are being built by Northrop Grumman Shipbuilding and General Dynamics Electric Boat.

弗吉尼亚级Block III潜艇正由诺斯罗普·格鲁曼船舶公司和通用动力电船公司建造。

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Motion parameter estimation play an important role in image matching, electric image stabilizing and image Mosaic, and the block-matching algorithm is the most used method.

运动参数估计在图像配准，电子稳像以及图像拼接中起着很重要的作用，其中块匹配算法是经常使用的一种方法。

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Violent space weather can make electric systems stop working. It can block satellite signals to Earth. It can interfere with radio signals and air travel.

恶劣的太空天气会让电网瘫痪，让卫星信号无法传回地球。它还会干扰无线电信号和航空运输。

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Kempton argues his idea doesn't have to wait for cheaper batteries, the main stumbling block to production of electric vehicles.

FORBES: A Light Bulb Goes On

He defended Illinois' efforts to block the advance of silver and bighead carp toward the lakes by hiring commercial fishermen and operating an electric barrier, but acknowledged more needs to be done.

NPR: Gov. Quinn Open To Great Lakes-Mississippi Split