Remember that these cells are relatively large compared to bacteria and so diffusion doesn't occur very quickly over this length scale.

要知道这些细胞相对细菌而言,还是比较大的,扩散作用在这种尺度上,发生得不是那么快

耶鲁公开课 - 生物医学工程探索课程节选

And I don't have to worry about these relative dimensions because we know from Marsden's calculations that, on the length scale that I have shown here, these would be just tiny little dots.

我们不必考虑,它们的相对大小,因为从马斯登的计算中我们可以得知，就从我现在给你们演示的这种相对距离来说，这些电子将只是一些很微小的斑点。

麻省理工公开课 - 固态化学导论课程节选

He says, I plead guilty, but your physics is useless at this length scale.

他说，我没有错，而是你的物理在这个尺度上没有用武之地。

麻省理工公开课 - 固态化学导论课程节选

At atomic length scale, limits on our ability to observe.

在原子长度问题上，我们的观察受限。

麻省理工公开课 - 固态化学导论课程节选