森林面临的最大威胁不是砍伐,而是漠不关心。
The future belongs to those who can harness energy wisely.
世间没有什么能抵消春天的忧愁,不如对着苍天痛哭一场作罢。
The only thing I can rely on is my own uncertainty.
The rule, or measuring rod, which the behaviorist puts in front of him always is: Can I describe this bit of behavior I see in terms of "stimulus and response"?