gd是什么意思 gd在线中文翻译

abbr. 重量密度（gravimetric density）；大公爵（Grand Duke）；大公爵夫人（Grand Duchess）；气体检漏器（Gas Detector）；（邮件的）存局候领（处）（General Delivery）

n a nerve agent easily absorbed into the body; a lethal cholinesterase inhibitor that is highly toxic when inhaled

n a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group