put down as  估计

put down the pollution from headstream  从源头削减污染

put down to  归因于

put-down  令人难堪的言行

to put down  镇压

put one’s foot down  坚决

put one’s name down for  申请成为...的候选人

put-put  砰砰声

in-put and out-put mode  语言输入输出

put option on a put option  看跌期权的看跌期权

automatic emergency shut-down and slow-down circuit  自动应急停车和减速电路

COOL DOWN; COOLING DOWN  缓和运动

down sprue (down-gate)  竖浇道

down-comer (down take)  降流管

down-converter(down-convertor)  下换器; 降频转换器

down-gate (down sprue)  竖浇道

down-supply and down-return  下供下回

look-down shoot-down  下视下射

printed down-proof cotton cloth duck down quilt  印花防绒棉布鸭绒被