When acquiring the pavement image, the acquired image is hard for image segmentation and recognition because of the noise and the nonuniform background illumination.
在获取路面图像中，由于背景光照不均匀以及存在着一些路面噪声，给后来的图像分割及识别带来了一些困难。
We need to make sure that millions of workers who are still pounding the pavement looking for jobs are not denied unemployment benefits to carry them through hard times.
我们还需要确保数百万还在艰难寻找工作的人获得失业救济，从而帮助他们渡过难关。
The mechanical and application condition of pavement on long span steel bridge deck is so hard that the paving material is of high requirement.
大跨径钢桥桥面铺装层的使用条件和受力状态十分恶劣，对铺装层材料要求非常高。
The delivery truck hauls it all to the work site where the construction workers are hard at work rolling the new pavement flat with the road roller and hauling bricks in the wheelbarrow.
送货卡车则把它所有工地的建筑工人在努力工作的新路面滚动与压路机单位，并拖砖的独轮车。
Hard asphalt mixture have well pavement performace, and have better mechanical performance fatigue resistance and water damage resistance.
硬质沥青具有良好的路用性能，在常温状态下还具有较常见基质沥青好的力学性能、耐疲劳性能和水稳性。
LIANG Chun-yu. Test Study of 30# Hard Grade Asphalt Used for Mid or Lower Surface Layers of Asphalt Pavement[D]. Chuangchun:Jilin University, 2007.
梁春雨。30#硬质沥青用于沥青路面中下面层的试验研究[D]。长春：吉林大学， 2007。
LIANG Chun-yu. Test Study of 30# Hard Grade Asphalt Used for Mid or Lower Surface Layers of Asphalt Pavement[D]. Chuangchun:Jilin University, 2007.
梁春雨。30#硬质沥青用于沥青路面中下面层的试验研究[D]。长春：吉林大学， 2007。
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