undercharged的音标？

The shop assistant has undercharged us.售货员向我们要价很低。He had the impression that they always undercharged him.他觉得他们总是少算了帐.He undercharged me two dollars for the wine.我买这瓶酒他少收了我两美元....

v.少收钱( undercharge的过去式和过去分词 )，未给（枪等）装足火药，对…充电不足...