单词	preliminary concentration
释义	preliminary concentration 预选
随便看	Standing-wave cavity field standing wave coefficient standing wave conditions standing-wave conditions standing wave current standing wave demonstration instrument standing wave design standing wave detector standing-wave detector standing wave effect standing wave electron linear accelerator standing wave energy standing wave experiment standing wave field standing water standing water depth standing water level standing waters standing wave standing-wave standing wave accelerator standing wave aerial standing wave amplifier standing-wave indicator standing wave instrument way