variable bias可变偏压variableadj.可变的；易变的n.变量；易变的东西Variable universe fuzzy systems变论域模糊系统variable neutral density filter可变中性密度滤光器variable slope delta modulation可变斜率增量调制variable fuzzy evaluation model模糊可变模型variable head permeability test变水头渗透试验variable gravitational constant引力常数变化variable frequency water supply变频供水variable path handling expenses[经] 变途搬运费variable-resistance pick-up变电阻拾声器,变阻拾音器variable-pressure accumulator变压式蓄热器