Mathematics is the language with which God has written the universe.
The only safe thing is to take a chance.
形容自然景观的壮丽与难以用笔墨完全描绘。
创造力是用之不竭的。你用得越多,拥有的就越多。
森林的真正价值不仅仅以木材的板英尺来衡量,还在于它所维持的生命和生态系统。