Radiospectrum
射频频谱
🗣️ 情景例句
Tomorrow morning at ten o'clock. Try it.
明早上午十点。来试一试吧。
For a few, scholarships were sources of support.
有少数人，奖学金是他们接受教育的学费来源。
I bought it the day it was released.
它发行的当天我就买了。