图片新闻【172】屋顶花园

A woman reads a book in the rooftop garden of an apartment building overlooking a residential area of Tokyo, on August 5, 2002. Trapped by concrete and asphalt, heat from heavy traffic and millions of air-conditioning units have made summer in the cities hotter -- a phenomenon known as 'heat-island effect.' By converting a bare roof top into a green oasis, it helps absorb heat and keeps temperatures inside the building lower. (Yuriko Nakao/Reuters)

词汇：

rooftop garden：屋顶花园
asphalt n.沥青
phenomenon n.现象
heat-island effect：热岛效应
convert v.转变
oasis n.(沙漠中)绿洲