This year, Beijing has experienced repeated bouts of severe air pollution, with two smog “red alerts” having been issued this month. When I visited Beijing in 2005, immediately after the commemorations of the 60th anniversary of the end of World War II, the sky was clear.
再有就是空气质量。今年以来，北京反复出现了严重的空气污染，仅本月就已经两次发出雾霾“红色预警” 。2005年我访问北京是在二战结束60周年纪念活动后，当时的天空非常晴朗。