City traffic engineer Joe Olson said traffic engineers plan to update the city's Opticon system this year to block unauthorized light-changing signals.

朗蒙特市交通工程师奥尔森指出，他们计划在今年更新该市的Opticon系统，查处那些未经许可擅自使用的改变信号灯装置。

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Anesthesia is used during operations and other medical procedures to block pain signals from traveling through the nervous system.

麻醉被用于手术和其它医疗程序中，以阻止疼痛信号在神经系统中传导。

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Anesthesia is used during operations and other medical procedures to block pain signals from traveling through the nervous system.

麻醉应用于手术或者其他医疗程序中以组织疼痛信号传向神经系统。

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The so-called manual-block system takes the place of a dozen separate signals that help drivers adjust their speed and avoid colliding with other trains in the dark tunnels.

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