"暗河"是个多义词，它可以指暗河（地下岩溶地貌的一种）,暗河（冯佳界&西山的歌曲）,本城公案。
...暗河，连通试验 [gap=945]s Stannum Poly-metallic deposit of Xianghualing,Hydrogeological Characteristics,Underground-river,Connective experiment ...
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Reactor what likes a obdurated underground river is used for country marsh gas family pool with several stere and also for natural gas mine with several million stere. marsh gas has 75% methane.
这样,为沼气生产规模化铺平了道路,暗河式置于地下像一条封密式的暗河,其容积小到几立方米,用于农村家用沼气地,大到几百万立方米的人工天然气矿。
参考来源 - 暗河式剩余污泥厌养发酵工艺研究·2,447,543篇论文数据，部分数据来源于NoteExpress
此处的地下暗河据说可直通东海。
It is said that the underground river here can link with the East Sea.
探索未知洞穴，航行于地下暗河使得洞穴探险分外刺激。
Exploring unknown caverns and navigating underground rivers is what makes caving so thrilling.
研究目的：本文研究总结大型暗河的发育特征及工程处理方法。
Research purposes: This paper studies and summarizes the development characteristics and engineering treating method of large-scale underground river.
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