festoon       
 verb [ T ] uk/fesˈtuːn/ us/fesˈtuːn/
 给…饰以花彩;结彩于
to decorate a room or other place for a special occasion by hanging coloured paper, lights, or flowers around it, especially in curves
  The hall was festooned with Christmas lights and holly. 大厅里悬挂着圣诞彩灯和冬青枝。 
 festoon      
noun [ C ] uk/fesˈtuːn/ us/fesˈtuːn/
 (彩纸、花等做成的)花彩
a decorative chain made of coloured paper, flowers, etc. hung in a curve between two points