主动: initiative变量: variable; variable quantity; ...波动变量: wave variable流动变量: flow variable游动变量: running variable运动变量: kinematic variable自动变量: automatic variables决策形势中的行动变量: action variable in decision situation变量: [数学] variable; variable quantity; alternating quantity◇变量范围 range of variables; variable range; 变量函数 variable function; 变量系数 variation coefficient主动: 1.(能够造成有利局面) initiative 主动作某事 do sth. on one's own initiative; do sth. of one's own accord; 争取主动 try to gain the initiative; contend for the initiative; 主动为人们做好事 be active in doing good to men; 主动求婚[爱尔兰] take the initiative in courtship; 她不愿意主动这么做。 she does not like to do so from her own initiative. 他工作很主动。 he displays great initiative in his work.2.[机械工程] driving; 主动报价 unsolicited offers; 主动导航 active homing; 主动舵 active rudder; main rudder; 主动滑轮 driving pulley; feed pulley; 主动皮带轮 drive pulley; 主动注意 [心] active attention差动变压器: differential transformer传动变阻器: transmitting rheostat电动变焦: power zoom电动变流机: motor alternator; motor converter; motor-converter电动变流器: motor current-transformer电动变速器: electric gear shifting抖动变调: wow非转动变形: nonrotational deformation; nonrotationaldeformation滑动变阻器: slide rheostat; sliderheostat; sliding rheostat活动变换: active transition; activity map活动变形: active deformation流动变电所: mobile substation流动变电站: portable substation脉动变化: impulsive variation脉动变星: pulsating variable