in underground中文什么意思

[生活需要] 井下

• by underground:    乘地铁; 乘坐地铁; 坐地铁
• on the underground:    在地铁上
• the underground:    建议

例句与用法

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1. technical code for water proof in underground engineering
   地下工程防水技术规范
2. portable air compressor in underground coal mines
   煤矿井下移动式空气压缩机
3. improvement of cleaning technology in underground water bin
   清仓技术在矿井水仓的改进
4. research of fire and smoke development in underground garages
   露天矿设计理论的新发展
5. the characteristics of the times in underground space development
   地下空间发展的时代性