The motor carrier administration is already considering a rule to tighten its standards for medical certification of commercial drivers.

汽车运输安全管理局已在考虑将商业驾驶的医师证明标准规定得更紧。

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This paper issues a kind of Angle measuring tracking method for conical scan without hollow motor in moving carrier satellite communication system.

提出了一种在动载体卫星通信控制系统中，无需空心电机的圆锥扫描测角跟踪方案。

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Not only that, but the nervous system must also be trained, because it is the carrier of impulses through the sensory and motor channels.

不仅如此，神经系统也必须接受训练，因为它是通过感觉和运动通道运输神经脉冲的工具。

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The Federal Motor Carrier Safety Administration shut down three primary companies -- Apex Bus Inc.

CNN: STORY HIGHLIGHTS

It was the third shutdown of a passenger carrier this month following the motor carrier administration's deployment of more than 50 investigators to look at businesses considered to be high risk, the DOT said.

WSJ: Feds: NY bus company made drivers repair vehicles

Looking at five years of fatal crashes involving large trucks, 0.10 percent or one in a thousand involved the truck's couplings, hitches or chains, according to an analysis of federal data from 2007-2011 by the Federal Motor Carrier Safety Administration.

NPR: Runaway Trailer Crashes Rare; NY Accident Killed 7