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汉语拼音：bō duàn

无线电广播中，把无线电波按波长不同而分成的段。如长波、中波、短波、超短波。

1. 无线电广播中，把无线电波按波长不同而分成的段。如：长波、中波、短波、超短波。

• Even if it ultimately proved possible to make an aeroplane completely invisible at all wavelengths, there would be a further problem.

  即使有朝一日证明可以制造出在全波段都完全隐形的飞机，还会有一个更深一步的问题。

• The above image is shown in exaggerated colors combining violet and green light with light normally too red for humans to see.

  上面的影像是在比红光更红的、人眼无法看到的波段下拍摄的，结合了紫光和绿光显示了夸张的颜色。

• Since the Ka-band Wideband Global Satcom (WGS) satellite is now in service, GBS has added WGS to its broadcast network.

  由于Ka波段的宽带全球卫星通信（WGS）已经投入使用，全球广播服务已把WGS纳入其广播网络中。

• Filter is often used to interfere the spectral spectrum into different bands in free space laser communication.

  空间激光通信常采用干涉截止滤光膜对不同波段的光谱进行分光。

• The experimental results show that the method is superior to that of single-wave target detection.

  试验结果表明，该算法优于单波段的目标检测，有较强的实用性。

• The human eye can observed spectral range known as the mind of his own light, a long band of hong guang to a shorter-band blue light.

  人眼所能查察到的平谱边界称见地平，众较不幼波段的红平到较长波段的蓝平。

• The material could be applied to all parts of the electromagnetic spectrum, meaning it could be used to make materials invisible to radar.

  这种材料可以应用到电磁波谱的所有波段，这就意味着它可以用来让雷达对材料“毫无察觉”。

• One of the principal limitations of these lenses is abundant chromatic aberration that prohibits broadband use without design compensation.

  用作透镜，在原理上色差非常大，若不在设计上做出补偿，则会限制其在宽波段上使用。

• The ground-based radar at various band and optical system have been used extensively to measure and investigate the meteor event.

  在地面上，可以利用各种不同波段的雷达与光学照相设备进行流星事件的观测与研究。