✅ 同义词
🗣️ 情景例句
How are you doing?
你好吗？
Look over to the southeast and you can see the con stellation of Orion.
眺望东南方向，你就可以看到猎户星座。
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。