6.what roof slope is important for heat island reduction?屋面坡度对减少热岛效应的重要性是什么?
2:12 slope;> means steeped slope and requires an initial sri of 39 or greater; 2:12<_ means low slope and requires an sri of 82 or greater.
坡度2:12>意思是陡坡，sri数值应该在39或更高以上;坡度2:12<=意思缓坡，sri数值应该在82或更高以上。
