我逐渐认识到:人并非生而自由。
数学的美妙之处在于它常常引导我们发现关于物理世界的真理,而这些真理是我们无法通过其他方式发现的。
The next generation of forest leaders must be as comfortable with biodiversity metrics as they are with profit margins.
"The measure of a civilization is how it treats its weakest members."