跨部门合作是解决林业最大挑战的唯一途径。

The fear of death follows from the fear of life. A man who lives fully is prepared to die at any time.

Social progress requires the organic combination of individual freedom and social responsibility.

You have to be able to laugh at yourself and not take yourself too seriously.

In science, we must be interested in things, not in persons.

测量地球是地理学的基础。

最伟大的实验是那些挑战我们认为我们知道的东西的实验。