“主因”用英语怎么说？

主因未详.The details of the principal cause are not known.我开始感到很忧郁, 因为我明知道我是她的受难的主因.I began to be very pensive , knowing that I was really the instrument of her disaster.买主因无报盘而苦恼.Buyers are worried at the lack of offer....

“主因”的拼音为：zhǔ yīn...

“主因”的反义词：从因。...