从地球上出现人类开始,人与自然之间的亲密关系也随之诞生,而且,这种关系每一世纪都比以前变得更

The intimacy between man and Nature began with the birth of man on the earth, and becomes each century more intelligent and far reaching． To Nature, therefore, we turn as to the oldest age most influential teacher of our race; from one point of view once our task master, now our servant; from another point of view, our constant friend, instructor and inspirer． The very intimacy of this relation robs it of a certain mystery and richness which it would have for all minds if it were the reward of the few instead of being the privilege of the many． To the few it is, in every age, full of wonder and beauty; to the many it is a matter of course．