fiftynum.五十
Fifty states comprise the Union.五十个州组成美国。
Fifty Years of Olefin Polymerization烯烃聚合五十年
fifty percent impulse flashover voltage百分之五十脉冲闪络电压
fifty-nine points for febrile disease热病五十九俞
Fifty Years of Sino-Nepalese Relations尼中关系五十年
Fifty welders were declared redundant.已公布削减五十名焊工.
Fifty homes were declared uninhabitable.有50 处住宅已宣布不宜居住。