green lung

基本解释

A 15 x15 metre square, it ensures sunlight for all the rooms and acts as a kind of green lung.
這個院落衹有15乘15平方米，但卻能爲所有房間提供自然光，竝充儅一個天然的綠肺。
julemei.com
In order to better its environment, Shanghai, China's largest and most populous city is planning to build a forest park spreading out over 300 hectares of land, to be known as the "Super Green Lung".
爲了改善環境，中國最大的，人口最密的城市-上海，正在計劃建造一座佔地300多公頃的森林公園，稱爲“超級綠肺”。
In order to better its environment, Shanhai, China's largest adn most populous city, is planning to build a forest park spreading out over 300 hectares of land, to be known as the "Super Green Lung".
爲了改善環境，中國最大的，人口最密的城市-上海，正在計劃建造一座佔地300多公頃的森林公園，稱爲“超級綠肺”。

It was those skills which have turned our once-shiny space station into a steamy green bacteria-funky lung.
NEWYORKER: Lostronaut

an area of parkland within a town or city, considered in terms of the healthier environment it provides