new historic developing period新的历史发展时期
early historic period历史早期
An outlook on natural ecology results from man's rational reflection in a particular historic period about changes and developments of the natural world and theirs laws, and the relationship between human being and the nature, etc.
自然生态观指人类在一定的历史时期对自然界变化发展及其规律、人与自然的关系等问题的理性思考。
参考来源 - 论马克思主义的“生态观”