相关单词近義詞 plummet 鉛鎚, plumb （用鉛垂）測量...臨近詞plumbe, plumb, plumbous rhodanate, plumbous bichromate, plumbago refractory, Plumbago esquirolii, plumbaginous schist, plumb in the middle, plumbous antimonate, plumbous subacetate, Plumbeous Seedeater, plumb the depths of 返回 plumb bob