underground cave dwelling 地坑窑居
underground cave dwellings 地坑窑院
detecting in underground cave 洞内探测技术
stability of underground cave wall 洞室边墙稳定性
underground stream cave 伏流型溶洞
Inthis paper, a load- structure optimization model was suggested by which the undergroundcave can be designed automatically to meet these three requirements and an auto - optimumdesign for underground cave can be realized.
本文提出的一种荷载一结构优化模型能自动地按这三点要求设计地下洞室，从而实现了地下洞室的自动优化设计。
参考来源 - 地下洞室的一种优化设计模型·2,447,543篇论文数据，部分数据来源于NoteExpress
Bowl in an underground cave or inside an aquarium.
在一个地下洞穴的碗内或水族馆里。
In 1971 geologists discovered a large underground cave filled with natural gas while drilling in the Turkmenistan village of Derweze.
1971年，地质学家在土库曼斯坦达尔·瓦扎村庄进行钻井工作时，发现了一个巨大的充满天然气的地下坑洞。
In this underground cave, it is amazing that there are so many rocks in unusual shapes — some hang down, and others point upwards.
在这个地下溶洞中，真让人叹为观止，有如此众多造型奇特的石头，有的向下悬垂，还有的向上伸展。
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