Grave concerns about pollution and athletes donning masks disappeared after the fifth day, after heavy rains cleansed the skies and sun broke through for the opening of the track and field events.

• 人们关心的污染问题和运动员戴口罩的情况在第五个赛会日后就迎刃而解了，一场大雨洗净了天空，不像在开幕式田径场上雾蒙蒙的样子，这时的阳光洒满大地。