Nadel
针状突起
🗣️ 情景例句
I read my horoscope every morning, but I don't really believe in it.
我每天早上都看我的运程，但是我不相信它。
It won't take much time.
不会花很长时间的。
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。