亚洲人成网站18禁止中文字幕,国产毛片视频在线看,韩国18禁无码免费网站,国产一级无码视频,偷拍精品视频一区二区三区,国产亚洲成年网址在线观看,国产一区av在线

Water quality tests have been conducted on the southern artificial lake of the Beijing National Stadium, the main venue for the 2008 Olympic Games.

Plants have also been grown beneath the water surface, aiming to purify the water.

The National Stadium, also known as the bird's nest because of its unique design, is the main track and field stadium for the Olympics and will host the opening and closing ceremonies.

(chinanews.cn June 8, 2007)