美国有线新闻 CNN 疫情引发美国线上教学和线下教学之争（在线收听）

Which of these U.S. school districts has the largest student enrollment? Miami-Dade County, Florida, Clarke County, Nevada, Broward County, Florida or Houston, Texas. According to the U.S. Census Bureau, Miami-Dade County has the largest student enrollment on this list.

下列美国学区中，哪个学区的学生人数最多？佛罗里达州迈阿密戴德县、内华达州克拉克县，佛罗里达州布劳沃德县还是得克萨斯州休斯顿市？根据美国人口普查局的数据，迈阿密戴德县的学生人数是上述名单中最多的。

At some point last year, schools in all 50 states were closed to in-person learning because of concerns about the coronavirus pandemic. Now according to edweek.org, partial closures have been ordered in five states.

去年的某个时候，由于担心冠状病毒疫情，美国所有50个州的学校都停止面授学习。现在，根据美国教育周报网站，五个州已下令部分学校关闭线下教堂。

In-person learning has been required in four states and the 41 other states allow in-person learning though many governments have districts decide whether they'll be open and what their restrictions are. Studies have shown that in communities were the virus isn't widespread or where masks are worn and regular testing is done, schools can be open without causing more problems.

有四个州要求进行线下教学，另外41个州允许线下教学，不过许多政府允许各学区自行决定是否开放线下教学以及有何限制条件。研究表明，在病毒没有扩散的社区，或在居民佩戴口罩并定期进行检测的社区，学校可以在不造成更多问题的情况下开放。

But some researchers are concerned that where there is widespread transmission, there could be more exposure in schools and that kids and teachers who catch COVID there could spread it through their communities. There've been concerns raised by teachers about their risk of catching coronavirus.

但一些研究人员担心，在病毒广泛传播的地方，学校里可能有更多接触，而在学校感染病毒的学生和老师可能会通过各自的社区传播病毒。老师也提出了他们对感染冠状病毒风险的担忧。

There's a debate raging about whether virtual learning is as effective as in-person learning and experts have voiced concerns that school closures may be taking a toll on student's mental health. So there's no nationwide consensus on what the right approach is and that's a challenge being faced by other countries as well.

人们就线上学习是否和面授学习一样有效展开了激烈辩论，专家表示，学校关闭可能会对学生的心理健康造成损害。因此，至于哪种教学方式更好，全国范围内尚未达成共识，这也是其他国家面临的挑战。