文字稿:
The festive season has got underway in Rio de Janeiro in spectacular style.
The world's largest floating Christmas tree has been lit up in the heart of the city.
Over 100,000 people flocked to the lagoon to watch a six-minute fireworks show. It's become one of Rio's main tourist attractions.
This year, the decorations on the 85 metre-high structure have been based on the four seasons.
Vocabulary 词汇:
The festive season 圣诞欢庆季节
lit up 点燃（灯火）
flocked to 蜂拥而至
fireworks show 烟花表演
decorations 装饰物
