The structure forms and the construction craft of unbound graded aggregate base are analysed. It will be of some use in unbound graded base which are used for baseofroad.
深入分析了级配碎石基层的路面结构形式和施工工艺，对级配碎石广泛应用于路面基层具有一定的指导意义。
2
Just up the road, at Edwards Air Force Base, is the runway where nearly half of all shuttle flights touched down.
就在爱德华兹空军基地的这条路上，有一条跑道，几乎一半的航天飞机都在这里降落。
3
A stretch ofroad outside one former army base, which offers target practice to anyone who walks in, was packed with cars.