在19世纪后期，生态学从它的自然历史和植物地理学的根源开始发展为一门独立的科学。
In the late nineteenth century, ecology began to grow into an independent science from its roots in natural history and plant geography.
列举了目前全球性环境面临的种种问题，较为详细分析了其形成的根源及发展趋势，指出对环境的保护已刻不容缓。
The article presents the global environmental problems human face currently, analyses their root and development situation, and points out that the environmental protection has been urgent.
人口激增，工商业蓬勃发展，这些人类活动正是污染的根源。
The rapid growth of its population, industry and commerce remain at the root of pollution by human activities.
城市化水平低、第三产业需求量小是第三产业发展缓慢的根源。
Low urbanization and small demand of the tertiary industry are the root for slow development of the tertiary industry.
核心竞争力是企业竞争优势的根源，是企业发展壮大的基石。
The competition strength of a enterprise determines the success in competition, and it also the basis of the enterprise's development.
并在此基础上揭示出农村基督教发展壮大的根源及其发展趋势，给农村基层工作打开一扇了解农村精神文化生活的窗子。
What's more, it also reveals the source and trend of rural Protestantism development so as to open a window to learn rural spiritual and cultural life.
并在此基础上揭示出农村基督教发展壮大的根源及其发展趋势，给农村基层工作打开一扇了解农村精神文化生活的窗子。
What's more, it also reveals the source and trend of rural Protestantism development so as to open a window to learn rural spiritual and cultural life.
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