重点“could have ～ed“ 意思 you were able to do, but didn't do。在英文里属“ 或许可以的假设“ 而实际上并没有或不确定。 唉，给你举个例 “You could have passed the test （=You were able to pass the test, but you didn't. 翻译：你（本或许能够）通过测试，但你（实际上）并没有)
而具体到那句“we are “72 hours into the diagnosis,” meaning the president could have tested positive as early as Wednesday”后半句是对“72 hours into the diagnosis,”的进一步解释，意思是总统早在周三或许可检测出阳性，but the president didn't 。总统（实际上）并没有，就是说，根本就没有检测，如果检测了其结果或阴或阳，不确定，医生只是种假设倾向，如果检测了可能会是阳性。 就是说周三时并没确诊，
咋不明白呢 说说XXXX meaning 。。“XXXX 意味着。。”是你说的吧？ 啥意思？ 意味着。。才是对前面的进一步解释/说明啊，这“72 hours into the diagnosis,”医生团队讲话是周6早上吧，从那个时间点推72小时，就是周三早上吧？ 就是说“72 hours into the diagnosis,”医生团队从周三早上就开始注意/诊断总统身体状况。但周三并没有做检测。
https://www.washingtonpost.com/elections/2020/10/03/trump-covid-live-updates/
https://www.wenxuecity.com/news/2020/10/03/9926295.html
https://blog.bcbsnc.com/2020/07/a-timeline-of-covid-19-symptoms/
https://www.bbc.com/news/health-52133054
https://foamcast.org/2020/03/26/covid-19-timeline-of-disease-and-viral-shedding/
就是说川普在辩论时已经感染了。周三阳性结果出来后还有近两天的时间不戴口罩参加了很多活动。这显然缺乏责任感，没有将他人的安危放在心上。
Sean P. Conley, Trump’s physician, said we are “72 hours into the diagnosis,” meaning the president could have tested positive as early as Wednesday
请给翻译下？
特朗普的医生肖恩·康利（Sean P. Conley）说，我们已经“诊断72小时了”，这意味着总统早在星期三就可以检测出阳性
重点“could have ～ed“ 意思 you were able to do, but didn't do。在英文里属“ 或许可以的假设“ 而实际上并没有或不确定。
唉，给你举个例 “You could have passed the test （=You were able to pass the test, but you didn't. 翻译：你（本或许能够）通过测试，但你（实际上）并没有)
而具体到那句“we are “72 hours into the diagnosis,” meaning the president could have tested positive as early as Wednesday”后半句是对“72 hours into the diagnosis,”的进一步解释，意思是总统早在周三或许可检测出阳性，but the president didn't 。总统（实际上）并没有，就是说，根本就没有检测，如果检测了其结果或阴或阳，不确定，医生只是种假设倾向，如果检测了可能会是阳性。 就是说周三时并没确诊，
咋不明白呢
说说XXXX meaning 。。“XXXX 意味着。。”是你说的吧？ 啥意思？
意味着。。才是对前面的进一步解释/说明啊，这“72 hours into the diagnosis,”医生团队讲话是周6早上吧，从那个时间点推72小时，就是周三早上吧？ 就是说“72 hours into the diagnosis,”医生团队从周三早上就开始注意/诊断总统身体状况。但周三并没有做检测。
'the diagnosis'没有歧义，就是 covid-19的诊断。
“into the diagnosis' ---开始进入诊断程序，诊断总有个过程啊，观察--》核酸检测--》结果出炉（确诊）。。
周3还没有做核酸检测，哪来检测结果？用啥确诊？
美国出生的孩子'72 hours into the diagnosis'的意思，答案是'it has been 72 hours since he was diagnosed.'