green area短语¹³¹⁶²⁰⁺³ 基本例句 绿化区,绿化带 Air pollution in Qinhuangdao resulted from large- scale coal transportations, constructing sites, poor urban health management, unreasonable green area distribution, and lower central heating ratio. 影响秦皇岛市空气质量的不利因素有煤炭运输规模大、建筑工地及城市卫生管理不严、绿地分布不合理、集中供热规模偏小等。 cnki