Isoparorchidae
[医] 等睾科
🗣️ 情景例句
They are very much in love.
他们正在热恋。
At what time?
什么时间？
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。