The physics behind cool roofs is simple.
“降温屋顶”背后的物理原理十分简单。
Smoke hung over the roofs in the direction of the Halles.
菜市场那边的屋顶上冒着烟。
Better roofs and drainage will help protect relics from weather damage and theft.
改善防雨遮檐和排水系统，帮助保护文物免受天气损害和偷盗。
This can include rubble (brown) roofs.
这可能包括碎石(褐色)屋顶。
Green roofs are necessity, not a luxury.
屋顶花园是必需品，而不是奢侈品。
The heavy wind blew roofs off in several cities.
在好几个城市大风掀掉了屋顶。
Set up scaffolding to provide safe access to roofs.
设置脚手架，以提供通往屋顶的安全通道。
Green roofs are an important part of an urban afforestation.
绿色屋面是城市绿化的重要组成部分。
But some were too late. The heavy snow caused some roofs to collapse.
但有些已经来不及了，厚重的雪导致一些屋顶坍塌。
The roofs protect the floor-to-ceiling glass from direct sun radiation.
屋顶可以保护落地玻璃免受太阳的直接辐射。
The roofs keep green in four seasons, and become actual "air gardens".
楼顶上一年四季瓜菜常绿，成了名副其实的 空中菜园 。
Painting roofs white is also safe... but not likely to make much impact.
把房顶涂成白色也很安全，但是这对减少全球变暖可能不会有多大效果。
Because traditional black asphalt roofs heat up in summer and strain the air conditioners.
因为传统的黑柏油屋顶在夏天的时候会吸热，加重了空调的负荷。
"Many hut roofs and signs on the streets have been blown away," another resident said.
“许多屋顶和街道标志被吹走了，”另一位居民说。
BLOG: White Roofs Help Cities Chill out.
部落格：白色屋顶有助于城市“降温”。
BLOG: White Roofs Help Cities Chill out.
部落格：白色屋顶有助于城市“降温”。
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