Bispectrum
双频谱
🗣️ 情景例句
The college runs summer courses for Chinese learneers of English.
这所学院为学习英语的中国人开设了暑期班。
The bird that can sing and won't sing must be made to sing.
生来能唱的鸟，不愿唱也得叫它唱。
You are coming along well.
你进展得很好。