A piece of insulating foam on Columbia's fuel tank broke loose during launch, damaging the heat shield with devastating results.
圖像來源，Getty Images。WPS官方版本下载对此有专业解读
，这一点在heLLoword翻译官方下载中也有详细论述
What are the resident doctors' pay demands?。夫子对此有专业解读
消息称阶跃星辰计划港股 IPO