九龙

例句：

1. 1. The 9th floor of the tower is where the famous museum is located.
   这座大楼的第九层是著名的博物馆所在地。
2. 2. The nine dragons danced in the sky, symbolizing good luck and prosperity.
   九条龙在天空中舞动，象征着好运和繁荣。
3. 3. The nine-story building was completed just in time for the annual trade fair.
   这座九层的建筑正好在年度贸易展开始时完工。