在气温回暖时，水分可能渗入路面的裂缝中。随后当水结冰时体积膨胀，对路面形成向上的压力。而当车辆碾过这些区域时，重量会导致路面破裂，沥青被挤出，形成坑洞。

NEW YORK, April 23 (Xinhua) -- On a crisp spring Saturday, the sound of swords slicing through the air and the rhythmic thuds of martial artists landing strikes echoed through a packed venue in Nassau ...

绿色优良设计奖 （Green GOOD DESIGN ...