The urban natural environment is an important part of urbanecologicalsystem.
城市的自然环境是城市生态系统中的重要组成部分。
2
Green space system is important part of urbanecologicalsystem, playing a decisive role in the improvement of urbanecological environment.
园林绿地系统是城市生态系统的重要组成部分，对于城市的生态环境有着决定性的改善作用。
3
Urban Greenland system is an important part of urbanecologicalsystem, and the ecological benefit of Greenland affects the quality of environment of whole city.