high-grade highways是什么意思 high-grade highways怎么读
high-grade highways的用法和样例
- The highway running through the Taklimakan Desert is a long-distance graded highway,the first one in the world built on shifting sands.
穿越塔克拉玛干大沙漠的沙漠公路，是世界上首次在流动性大沙漠上修筑的长距离等级公路。
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