人在年幼时就开始学习，用心容易专一，没有别的事情干扰，所以容易学成。有人说，14岁前是学习的黄金时期，暂不说其中的科学依据，对于孩子来说，他们的好奇心、理解力、想象力和创作力正处旺盛期，也是集中学习受干扰少的最佳时期，因此在孩子最佳培养阶段，家长要懂得培养。

不为苏联解体而惋惜的人没有良心，想恢复苏联的人没有头脑。

A sober looks shows that just have the world gotten to be a better place after all; it is also grown a bit worse at the exact same rate.; a one step up, a one step back sort of cosmic balance between forward progress, and cultural retreat, that puts man kind on a bell curve of existence.

It is not unlikely, but that there may be yet invented several other helps for the eye, as much exceeding those already found, as those do the bare eye.

The concept of computational complexity is not just about how fast we can compute, but also about understanding the limits of what can be computed.