variable bias可变偏压variableadj.可变的；易变的n.变量；易变的东西variable-slop delta modulation可变斜率增量调制variable length record disk sort可变长度记录磁盘分类variable speed-limiting marker可变限速标志variable cultivating temperature变温培养variable overhead price variance变动制造费用价格差异variable frequency speed control变频调速variable band-width estimation变窗宽估计variable pitch spacing mechanism可变点距机制variable address multiple access可变地址多路存取variable diameter expansion tool变径膨胀工具

1. Age is always an ambiguous variable in survey research.
   年龄总是调查研究中的一个可变因素。