单词	双头合钉
释义	双头合钉double headed nail
随便看	effective voltage overshoot effective volume effective volume of effective volume of blast furnace effective wake effective watt effective watt true watt effective wave length effective wavelength effective--wave-length effective wave slope effective well radius effective width effective wind effective wind speed effective wing loading effective word effective word location effective work function effective working hour effective writer effective yield effectivities effectivity effectivity change