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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Anyone who's cycled through Amsterdam will know that the Dutch show no mercy towards the amateur cyclist, often racing past them at high speed and cutting them off in between tram lines and bus stops.

BBC: Spoking the fire in Amsterdam

Yet, because young Germans often spend six years at university while young Canadians can choose flexible, high-speed courses, Canada's total cost per qualified graduate is less than half of Germany's.

ECONOMIST: A little learning