At the top of rocks was a man, his body was almost hidden by the storm clouds that hung low over the light house.

VOA: special.2010.05.08

And then when we got to more of a cellular level, that we could actually understand how our body worked as low of a level as thinking about cells.

肺怎么工作，我们到了细胞的层面上研究问题,从细胞的角度理解给我们身体,怎么工作就更加有趣了。

麻省理工公开课 - 化学原理课程节选

And then when we got to more of a cellular level, that we could actually understand how our body worked as low of a level as thinking about cells.

肺怎么工作，我们到了细胞的层面上研究问题,从细胞的角度理解给我们身体,怎么工作就更加有趣了。

麻省理工公开课 - 化学原理课程节选