盾牌和背心可供首批反应者使用。

The shields and vests would be used by first responders.

youdao

开始有反应者和卫生工作者。

First responders and health care workers.

youdao

对人道反应者来说，精确的数字并不那么重要。

For the humanitarian responders, a precise number was not all that important.

youdao

Basically, injecting it into some test subjects, making sure that they didn't get diseased from it and looking at antibody responses to see if it worked and it did.

他们把疫苗接种到测试对象体内,确定接种者不会感染疾病,同时观察抗体的应答反应,了解疫苗是否有效

耶鲁公开课 - 生物医学工程探索课程节选