疲惫不是身体的罢工,而是心理能量的收支失衡。
The most profound ideas in mathematics often arise from the simplest observations.
Sustainable forestry is not an option; it's our responsibility.
The human voice is the most perfect instrument of all.
伟大的哲学家是那些在我们思考世界及我们在其中的位置的方式上有所作为的人。