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

run down [= running down]  撞沈对方; 迎首碰撞

a fallen lung  坠落肺症

annual withered and fallen amounts  年凋落量

cicadula sexnotata fallen  六点叶蝉

Delphacodes striatella Fallen  灰飞虱

Disturbing intensity of stump and fallen woods  伐倒干扰强度

drosophila obscura fallen  酱油果蝇

Dry fallen wood  泄K材

fallen  倒下的

fallen among  陷于