In critical cases, it can enter the blood stream, where it binds to ACE2 receptors on cells lining the vessels.

在危急情况下，它可以进入血流，在那里它与血管内壁细胞上的 ACE2 受体结合。

So those are the cases. They're isolated away ones, people actually sort of move through the system suspect cases, mild to moderate cases, and hospitalized severe and critical cases who are actually in hospitals.

所以情况是，在中国，这群人与家人隔离开。在这个体系里人们按病情分类：疑似病例、轻症病例，以及在医院的重症病例。

I hear that there had been a pileup on Freeway 215 and these were the victims. I can see a doctor performing triage and the most critical cases are taken into exam rooms and maybe directly into surgery.

我听说 215 号高速公路上发生了一起连环撞车事故，受害者就是这些人。我可以看到医生进行分诊，最危急的病例会被带入检查室，甚至可能直接进入手术室。