—— 请按键盘 空白键 开始游戏 ——

A good mathematician is lazy, but in a constructive way.
The true cost of seafood must include the cost of preserving our oceans.
If you go back a few hundred years, what we take for granted today would seem like magic—being able to talk to people over long distances, to transmit images, flying, accessing vast amounts of data like an oracle. These are all things that would have been considered magic a few hundred years ago.
对幼儿来说,妈妈的声音是具有特殊意义的参照物。