Sustainable forestry is not an option; it's an obligation.
可持续林业不是一种选择；它是一种义务。
I don’t like to gamble, but if there’s one thing I’m willing to bet on, it’s myself.
Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.
The truth is not something we find, but something we create.
The true value of a tree is measured in decades, not dollars.
宇宙是一个相当大的地方。如果只有我们，那似乎是对空间的极大浪费。