VOA慢速英语:From Bhangra to Reggae, a Musical Trip Around the World

例句：Round-the-clock service features this store.
      日夜服务是这家商店的特色。

2.redefine vt.重新定义

3.energetic adj.精力充沛的, 充满活力的,需要能量的,积极的

例句：He is constitutionally energetic.
      他体质强健, 精力充沛。

      I don't feel energetic enough to rush about, so I'll sit down.
      我感到没有力气东奔西跑, 我想坐下来。

4.celebration n.庆祝

例句：The celebration of Christmas is a custom.
      庆祝圣诞节是一种习俗。

5.barrier n.栅栏,障碍,壁垒,关卡

例句：The color of one's skin shouldn't be a barrier to success.
      肤色不应该成为成功的障碍。