In this paper, a kind of chip of video complex black signal is described with VHDL.

采用VHDL硬件描述语言设计一种再生视频复合消隐信号的专用芯片。

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On the photo of MRI, most of T1 and T2 photos had a lower or black signal area (flow-empty actions).

畸形血管团MRI表现：多数T1、T2加权像为纡曲成团的低或黑信号区（流空效应）。

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As long as you can see a below black signal, you are more than likely set up to get the best possible dynamic range from your display.

只要你能看到下面的黑色信号，你的设置就可以使你的显示器获得最佳动态范围。

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How could I signal to potential allies across the vast black reaches of interpersonal space?

NEWYORKER: Raj, Bohemian

For the first time, scientists have detected an oscillating signal of a star being destroyed by a supermassive black hole.

FORBES: Scientists Detect Star Being Devoured By Supermassive Black Hole

There, among 12-foot high stacks of old oscilloscopes and signal-conditioning gear, Williams points to a clunky black metal box about the size of an underwear drawer.

FORBES: Magazine Article