aDear IB graduate, 亲爱IB毕业生, [translate] a[imag(uoft)sin(2*pi*fc*t)] Welch PSD Estimate 正在翻译,请等待... [translate] aDo you know the feeling of missing you when I am looking at your photo every night. Do you know how happy I am when I dreamed that you kiss me. I ...