di.ba.sicadj.(形容词)Containing two replaceable hydrogen atoms.二元的:含有两个可取代的氢原子的Or or relating to salts or acids forming salts with two atoms of a univalent metal.含有两个一价金属原子的:盐类或酸类的,或者有关盐类或酸类的,它通过两个一价金属原子形成盐类