降: 降动词1.(投降) surrender; capitulate 短语和例子宁死不降 rather die than surrender2.(降伏) subdue; vanquish; tame 短语和例子一物降一物。 there is always one thing to conquer [overcome] another.
电压降: fall of potentialp.d. = potential droppotential fallvolt dropvoltage depressionvoltage dropvoltage-dropvolts lost
