The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission.
We are what we think. All that we are arises with our thoughts. With our thoughts, we make the world.
与在现实世界中实现客观理性行为所需解决的问题规模相比，人类心智制定和解决复杂问题的能力非常有限。
Legal systems are not static; they evolve over time in response to social changes.