| 单词 | 频率范围 |
| 释义 | 〔bandwidth〕The numerical difference between the upper and lower frequencies of a band of electromagnetic radiation, especially an assigned range of radio frequencies.带宽：电磁辐射频带中高频与低频之间的数值差，尤指某设定的无线电频率范围〔window〕A range of electromagnetic frequencies that pass unobstructed through a planetary atmosphere.电波反射装置：电磁波段能够不受阻碍地穿过行星大气层的一种电磁频率范围 |
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