v.乘( multiply的过去式和过去分词 );(使)相乘;(使)增加;(使)繁殖;
例句:
Four multiplied by five is twenty.
五乘四得二十.
His experience was multiplied as the years passed.
随着岁月的流逝,他的经验丰富了.
Hot weather multiplied the bacteria in the food rapidly.
炎热的天气使食品中的细菌迅速繁殖.