Trump waves green flag to start IndyCar race through Washington streets

发生了什么

The president took a ceremonial lap of the track before the race, which is the culmination of a summer of events to mark the country's 250th birthday.

摘要按规则整理自下方来源原文

时间线

1. 16:57
   BBC World 最先出现BBBC World
2. 20:19
   BBC Sport 开始报道BBBC Sport

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