narrow band

基本解释

The picture is a composite of images taken through both broad and narrow band filters.
这张图片是由宽带滤波器和窄带滤波器所拍摄的照片所合成的。
This composite was recorded through narrow band filters that transmit the light from ionized hydrogen, sulfur, and oxygen atoms in the region.
这幅图像是通过窄带滤波器记录下来的，它将该区域的离子化氢、硫和氧原子信号转化为图像。
Also at equinox, the shadows of the planet's expansive rings are compressed into a single, narrow band cast onto the planet as seen in this mosaic.
也是在春分点，广阔的土星环的影子被压缩成一层很窄带子投射在这个行星上，这也可以在组图中看到。

Throughout its history in the United States, the brand has had trouble breaking out of a narrow band of sales.
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For the last three years, copper has traded on commodity exchanges in a narrow band centering around 76 cents per pound.
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This is largely because members of long-running teams get into the habit of culling their ideas from a narrow band of sources: one another.
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a limited-capacity transmission channel such as that used for transmitting telephone calls and faxes &rarrcompare broadband