Bispectrum
双频谱
🗣️ 情景例句
Listen up.
听着。
Which one is easier?
哪一个是较简单的？
Was the noise a cause of the illness, or were the complaints about noise merely a symptom?
是噪音引起了（精神）病呢，还是（精神）病的症状之一是对噪音的抱怨？