Bispectrum
双频谱
🗣️ 情景例句
Dear Mr. Billet.
尊敬的比利先生。
Practice is better than precept.
身教胜于言教。
The man took heart and, sure enough, on New Years' Eve he was able to hobble along to a party.
果然，除夕时他可以一瘸一拐地去参加晚会了。