英语语法分析

That may not seem like much, especially given the proton's infinitesimally tiny size.

这也许并不起眼，尤其是考虑到质子极小的尺寸。

So, the probability that the whole city burns down is infinitesimally small, right?

在这样的假设下,整个城市都被烧掉的概率,是非常非常小的

I believe that life is infinitesimally brief in relation to the immensity of eternity.

我认为，与死后那慢长的永生相比，人生是极其短暂的。