"We have a situation where there are a lot of unknowns with how this virus is going to behave," Kelen says.

凯伦说，现在的情况是，这种病毒怎么作用还有很多未知因素。

youdao

"We have a situation where there are a lot of unknowns with how this virus is going to behave," Kelen says.

凯伦说，现在的情况是，这种病毒怎么作用还有很多未知因素。

youdao