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- The area contains vast underground cave systems. 这个地区拥有庞大的地下洞穴系统。
- Was he found and caught in an underground cave? 他是在地下洞穴被发现和捉住的吗?
- We explored an underground cave. 我们对一个地下岩洞进行了勘探。
- This process causes the underground caves that are often found in limestone. 这种过程是导致在石灰岩地形中经常形成地下溶洞的原因。
- The river runs through several underground caves which store the water for the city's use. 这条河流经几处贮存城市用水的地下蓄水池。
- Such holes and underground caves might be prime targets for future spacecraft, robots, and even the next generation of human interplanetary explorers. 这些洞和地下洞穴可能成为未来太空船和飞行器，甚至下一代人类行星探测器的主要目标。
- Mount Emei in Sichuan Province is a famous throughout China for its magnificent snowcapped peaks, intriguing underground caves, rivulets, waterfalls and dense, lush forests. 四川峨眉山以其壮丽的积雪山峰、奇异的地下洞穴、小溪、瀑布和稠密茂盛的森林闻名全国。
- See more glorious natural wonders as you go cave tubing. Float through underground caves to admire the rock formations. Learn about the ancient Mayans who once used the caves. 你也不妨乘轮胎内胎漂游到洞穴寻幽访胜，欣赏更多壮丽的自然奇观吧。漂游穿过各个地下洞穴，欣赏各种岩石造型，顺道认识古马雅人的历史，古马雅族人曾使用过这些洞穴。
- When they got to shore they searched around for trees. They found a very big tree that covered a little underground cave. 他们发现了一棵很大很大的树,树木遮盖著一个小小的地下岩洞。
- In the scenic area, there is an exotic and beautiful underground cave, which is called white cloud cave or crystal palace, and is belonged to underground lava topography. 景区内还有神奇瑰丽的地下溶洞,人们称之为白云洞或水晶宫,属地下岩溶地貌。
- Deep in the Romanian forest, a team of scientists stumbles upon the ruins of a 13th century Abbey which is built over the entrance to a giant underground cave system. 在罗马尼亚的森林深处，科学家们发现13世纪古老大宅的地底下，竟埋藏著一个超大型地底洞穴，他们聘请了一队洞穴探险家，进入洞穴查探究竟。
- The Empire constructed a correctional facility on Kessel's blighted surface where criminals and political prisoners were forced to toil in freezing underground caves to extract the spice. 帝国在凯索荒芜的地表建造一个矫正设施，强迫罪犯和政治犯进入寒冷的地下洞穴开采香料。
- Mt.Emei(Emei Shan) in Sichuan Province is famous throughout China for its magnificent snowcapped peaks, intriguing underground caves, rivulets, waterfalls, and dense, lush forests. 峨眉山位于四川省境内，因积雪山峰，奇异的地下洞穴、小溪、瀑布和稠密茂盛的森林而闻名遐尔。
- The numerical simulation of displacement of an underground cave was presented to verify the model in comparison with the results obtained by Goodman joint element-based FE analysis, and good accordance could be observed. 将岩体和节理按两种材料考虑，对地下开洞节理岩体结构进行有限元分析，并与采用复合本构关系的计算进行了比对，得到了令人满意的结果。
- The Mirny diamond mine is located in Siberia, East Russia.It is the largest artificial underground cave in the world, its depth is about 525 meter, and the radius of its entrance reaches 1200 meter. 米尔金刚矿场位于俄罗斯东西伯利亚地区，是世界上最大的人造地穴，它深约525米，入口直径达到了1200米。
- Under the mountain there is a network of caves. 这座山里有许多相通的洞穴。
- Recently they have laid an underground pipeline. 最近他们铺设了一条地下管道。
- A hermit used to live in the cave. 一位隐士曾经住在那个山洞里。
- Primitive people often lived in caves. 原始人常常住在山洞里。
- The missile is delivered from underground. 这种导弹由地下发射。
