一个建成区500平方公里的城市，如果按20%的比例计算其屋顶总面积约为

一个建成区500平方公里的城市，如果按20%的比例计算其屋顶总面积约为100平方公里，若屋顶绿化率达到30%或以上，则差不多有相当于建成区绿地面积一样大的裸露屋面在炎热的夏季吸收着巨大的太阳能

結果 (英文) 1:

A built-up area of 500 square kilometers of the city, if calculated according to the proportion of 20% the roof with a total area of about 100 square kilometers, roof greening rate of 30% or more, are almost as large as the equivalent of green space in built-up area of bare roof in the hot summer months to absorb a tremendous amount of solar energy

結果 (英文) 2:

A built-up area 500 square kilometers of the city, if you calculate the roof by 20 percent of the total area of ​​about 100 square kilometers, if the roof greening rate of 30 percent or more, almost equivalent to the built-up area as large green area exposed roof in the hot summer months to absorb the huge solar

結果 (英文) 3:

A built-up area of 500 square kilometers of the city, if calculated according to the proportion of 20% of the total roof area of about 100 square kilometers, if the roof greening rate of 30% or more, it is almost equivalent to the bare roof built-up area green area as large as the absorption of the huge solar energy in hot summer