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....
Profusely sweating and quivering with chills, he murmured his last words.出了很多汗的他打着冷战，含糊不清地说出了他的遗言。He is quivering with anger.他气得全身发抖.The pine needles were still quivering.松针还在抖动着....