Innovation in forestry means balancing ecological health with economic viability.
Everyone is a moon, and has a dark side which he never shows to anybody.
The behavior of the whole cannot be predicted from the behavior of its parts taken separately.
没有所谓的空的空间或空的时间。总有东西可看,有东西可听。
数学的乐趣在于发现的旅程,而不仅仅是目的地。