balance bar平衡杆balancen.平衡；天平；平静；结余；差额；调和；制衡vt.权衡；使平衡；抵消；称重量vi.均衡；建立平衡balanced density solvent平衡密度溶剂balance of acid and iron酸铁平衡balance principle method平衡原理方法Balanced sodium solution平衡盐液balance right and duties权利义务平衡balance adsorption ratio平衡吸附率balanced amino acid diet氨基酸平衡日粮balanced control surface平衡操纵面balanced valve amplifier推挽放大器balanced rotor vane pump平衡转子式滑片泵