But in practical purposes most of the time, they didn't-- they just mixed these together and they might use different things.

但实际上大多数情况下，她们并没有。。。,而是把财产混合在一起了。

耶鲁公开课 - 新约课程节选

And so that very practical consideration turns out to be important in how we use vaccines in real populations.

所以,如何使疫苗接种更便于,实际操作就变得非常重要

耶鲁公开课 - 生物医学工程探索课程节选