🗣️ 情景例句
You'll need to hurry up, or you'll miss the train.
你得快点，否则赶不上火车。
Are your neighbors vey friendly?
你的邻居友好吗？
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。