网络释义
1)The Youth and the st Century,廿一世纪的青年人2)The Youth and the 21st Century,廿一世纪的青年人3)21 st century,廿一世纪4)"The Story-Telling of History of 21 Kindoms",《廿一史弹词》5)Looking Forward to the st Century,展望廿一世纪6)Looking Forward to the 21st Century,展望廿一世纪7)1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8, 9,9,10,10-heneicosafluoro-12-iodo-Dodecane,1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10-廿一氟代-12-碘代十二碳烷8)1,1,2,2-Tetrahydroperfluorododecyl iodide,1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10-廿一氟代-12-碘代十二碳烷9)1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10-heneicosafluoro-12-iodo-dodecan,1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10-廿一氟代-12-碘代十二碳烷