So, here we have a picture of Dmitri Mendeleev, who is one of the scientists responsible for first compiling the periodic table.

这是一张德米特里？门捷列夫的画像，他是最早制作,元素周期表的科学家之一。

麻省理工公开课 - 化学原理课程节选

But still, he was able to put together a periodic table.

他依然能够将元素周期表制作出来。

麻省理工公开课 - 化学原理课程节选

This picture here, we're going to come back to this later in two weeks when we start talking about vaccines, and we're going to talk about how you make vaccines for viruses and so in doing that we're going to think about the life cycle of a virus.

看这幅图片,我们两周之内还会讲到这一内容,在开讲疫苗的时候,我们要讲讲怎么制作病毒疫苗,那时我们要,讲讲病毒的生命周期

耶鲁公开课 - 生物医学工程探索课程节选