Ratfink
n. 卑鄙的人
📖 牛津释义
ratfink
n (US sl derog 俚, 贬)
1 unpleasant person 讨厌的家伙.
2 informer 告密者.
🗣️ 情景例句
From what Robbie and Alexandra have told me,
从Robbie和Alexandra告诉我的情况， 看来
To knit the sweater
织毛衣
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。