频哪醇 频哪醇的英文 英语翻译 pinacol; pinacone; tetramethyl ethylene ketone 拓展翻译 频哪醇重排pinacol rearrangement频哪醇重排作用pinacol conversion频哪氰醇pinacyanol频哪酮pinacolone碰撞频率collision frequency偏组频率bias-set frequency拼合频率hybrid frequency频frequency; frequently频比frequency ratio频便pollakicoprosis频标frequency scale频带band; frequency band频带分割band splitting频带宽度frequency bandwidth频带宽度压缩band width compression频带扩展band spreading频带谱band spectrum频带清晰度band articulation频道channelfrequency channelchannel频道排channel bank