真相很少是纯粹的，也从来不简单。

Innovation in forestry isn't optional—it's essential for survival.

森林不仅仅是树木的集合，而是一个维持生命的活生态系统。

That's exhilarating if you're doing well, and very crushing if you're not. It leads, in the worst cases -- in the analysis of a sociologist like Emil Durkheim -- it leads to increased rates of suicide. There are more suicides in developed, individualistic countries than in any other part of the world. And some of the reason for that is that people take what happens to them extremely personally -- they own their success, but they also own their failure.

风险是与预期结果不同的可能性。

数学是给不同事物赋予相同名称的艺术。