✅ 同义词
🗣️ 情景例句
That's right.
是的。
One cannot eat one's cake and have it.
事难两全其美。
This depends on the precise radio frequency of the 21-cm wavelength, or 1420 megacycles per second.
这种通讯联系要靠21厘米波段，即每秒1420兆周的精确无线电频率。