—— 请按键盘 空白键 开始游戏 ——

The use of a program to prove the 4-color theorem will not change mathematics - it merely demonstrates that the theorem, a challenge for a century, is a finite problem.
孩子天生就能改进他们的行为,而且他们也喜欢这样。心理学家说,孩子必须游戏、因为借着游戏,孩子的发展才能更趋完善。
我们不仅仅是念诗,诗从我们舌尖滑落,就像蜜糖,情绪高涨,女人亢奋,灵魂驰骋。
What you actually pay for something is at least twice the listed price because of the energy, time, money needed to set it up, learn, maintain, repair, and dispose of at the end. Not all prices appear on labels. Actual costs are 2x listed prices.