Seats installed in main Olympic stadium 昨天，国家体育场“鸟巢”的8万张固定座椅全部安装完毕。固定座椅采用先进的聚丙烯材料制成，这种材料耐紫外线照射，至少三年不褪色。并且在弯曲力和挤压力方面都表现出色。 Seats await the spectators. (Photo credit: Zhang Zheng/China Foto Press) The 80,000 seats of the National Stadium, the architectural centerpiece of the 2008 Olympics and also known as the "Bird's Nest" for its distinct structure, have been installed on the stands, the Beijing Organizing Committee (BOCOG) said. Made of modified polypropylene, the seats have shown excellent performance in flexural strength and impact strength tests, and the colors of the seats will remain fade-resistant for three years under ultraviolet radiation, according to the construction company. The opening and closing ceremonies of the Aug. 8-24 Olympics as well as the track and field competitions will take place in the National Stadium, which is scheduled to be completed in April. Vocabulary: polypropylene: 聚丙烯 fade-resistant: 防褪色