人类心智是一套信息处理机制,这些机制由自然选择设计来解决我们狩猎采集祖先面临的适应性问题。
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.
作家应该是他时代的见证者,现实的记录者。