I'm sick of it as well. But I'm sick of not doing anything about it.
Mathematics is the language with which God has written the universe.
The only thing that comes to a sleeping man is dreams.
物理学的美在于它能够用简单而优雅的理论解释复杂的事物。
学习是系统中产生的任何变化,这种变化或多或少会永久性地改变其适应环境的能力。
Sustainability must be profitable, or it won't be sustainable.