He noticed that the clock on the mantelpiece said nine meaning twenty-one.
他注意到壁炉架上的座钟已是九点了，那就是说二十一点。
Twenty-one teams of nine riders each will have to endure 3, 600 kilometers of racing and 25 mountain passes to reach the finish line on the champs-elysees in Paris.
包括21支车队，每支车队的9名车手将会持续3,600公里的赛程和25座高山，最终到达巴黎的香榭丽舍大街。
The results were analysed by nine teams and then presented to a panel of twenty-one leading scientists for their recommendations.
九个小组分析了调查的结果并呈报于由二十一位优秀科学家组成的评审小组予以审批。
The industry of maintenance, reinforcement and reconstruction for the existing building structure is one of the most popular industries in the nine major industries of twenty-first century.
在役建筑结构的维修加固改造业是二十一世纪最受欢迎的九大行业之一。
Methods: one hundred twenty-nine patients were divided into 3 groups based on type of aperture fixation: none, bioabsorbable interference screws, and autogenous bone cores.
方法：根据隧道口加强的类型将129名患者分为3组：不加强固定、生物可吸收螺钉加强固定及自体骨加强固定。
Methods: one hundred twenty-nine patients were divided into 3 groups based on type of aperture fixation: none, bioabsorbable interference screws, and autogenous bone cores.
方法：根据隧道口加强的类型将129名患者分为3组：不加强固定、生物可吸收螺钉加强固定及自体骨加强固定。
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