The teacher forecast that twenty of his pupils would pass the examination.老师预测他有二十名学生能通过考试。Some twenty passengers were killed in the road accident.这次交通事故中约有二十名旅客死亡。About twenty workers picketed outside the gate.约有二十名工人在大门外担任纠察。Twenty miners were trapped underground.二十名矿工被困在地下。