🗣️ 情景例句
Did you see what she was wearing?
你看到她穿的是什么？
A good marksman may miss.
智者千虑，必有一失。
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。