81 岁的美国总统乔·拜登新冠病毒检测呈阳性，取消了拉斯维加斯演讲，并在特拉华州自我隔离。 81-year-old US President Joe Biden tests positive for Covid-19, cancels Las Vegas speech, and self-isolates in Delaware.

81 岁的美国总统乔·拜登新冠病毒检测呈阳性，这导致他取消了在拉斯维加斯的竞选演讲。 81-year-old US President Joe Biden has tested positive for Covid-19, prompting him to cancel a campaign speech in Las Vegas. 总统出现轻微症状，将在特拉华州自我隔离，同时继续履行总统职责。 The President is experiencing mild symptoms and will self-isolate in Delaware while continuing to carry out his presidential duties. 目前，民主党人对他是否能继续竞选白宫第二任期的能力越来越担忧。 This comes amidst growing concerns from Democrats about his ability to continue campaigning for a second term in the White House.