Wavebands
n. （无线电的）波段( waveband的复数形式 )
🗣️ 情景例句
Please sit down, Alexandra.
请坐 Alexandra。
I was at home all afternoon.
我整个下午在家。
he said. But I don't have many friends, and I don't enjoy myself very much. I don't know why!
他说，“但是我没有很多朋友，我过得不很愉快。我不懂为什么！”