调底是指演员唱的音高比伴奏乐器（胡琴、笛子等）的音高低八度。
他说，在经过11月底及12月初的回调后，食品价格已经出现反弹。
We have already seen food prices rebound after their initial fall in late November and early December.
是人对律感、音感、调感、织体感、节奏感、结构感等音乐底基要素的不同感觉。
They are people's different feelings of such music essential elements as temper, tone, mode, texture, rhythm and structure.
对原油回收站废弃含油污泥及联合站罐底含油污泥组分进行了分析，研制出了一种新的调剖剂。
The composition of waste oily sludge in a crude oil recovery station and bottom oily sludge in a central treatment station are analyzed , a new profile control agent is proposed.
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