你是自己生活的艺术家。不要把画笔交给别人。
林业实践的创新是平衡经济增长和环境保护的关键。
The secret of happiness is freedom, and the secret of freedom is courage.
言语有力量,但沉默可能更有力量。
To understand behavior, we must look at its purpose in the context of survival and adaptation.