英语词汇“地下 2”的读音、翻译、释义、用法及例句-家教网

词汇	地下 2
类别	英汉汉英翻译词典
释义	地下地下[dì xia]1.■（地面上） on the ground:从地下拣起pick up from the ground;掉在地下fall on the ground另见 dì xià。
随便看	proportional coupling proportional detector proportional divider proportional divisor proportional error proportional feedback proportional gain proportional gamma spectrometer proportional gas meter proportional governor proportional input proportional-integral-derivative controller proportional ionization chamber proportionalist proportionality proportionality coefficient proportionality constant proportionality factor proportionality law proportional limit proportionally proportional navigation proportional navigation course proportional numbers proportional opposition

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