In the fast signal measurement field, the coax cable's transmission bandwidth is not enough.

在快脉冲信号测量中，同轴电缆的带宽不能满足信号传输要求。

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The GPRS wireless data transmission technology is characterized by fast signal transmission, good stability and strong anti-interference.

采用GPRS无线数传技术，信号传输速度快、稳定性好、抗干扰能力强；

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At high speeds, logic signals often appear hairy, jagged and distorted because of fast signal rise and fall time. We must avoid these phenomena in the high-speed digital circuit system.

数据速率的提高导致数字信号的上升沿和下降沿时间不断缩短、脉宽变窄和周期减小，从而使数字信号在传输过程中出现毛刺、扭曲和扩展等畸变现象。

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Hiding a post is negative, while Liking or commenting on a post would be positive -- sometimes our algorithms don't hear the user signal fast enough.

ENGADGET

Fast or sudden movements signal predators to penguins, and they react accordingly.

BBC: Getting personal with penguins in Antarctica

This system, Positive Train Control (PTC), is intended to stop or slow a train automatically if a driver goes too fast or passes a red signal.

ECONOMIST: American railways