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.
生态学的长足发展和生态学思维方式的出现，为研究和彻底解决城市问题提供了有力的工具。
Fortunately, the rapid development of ecology and relevant ecological consciousness provides us with a powerful tool to study and thoroughly solve urban problems.
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