underground river

基本解释

Moving to the entrance of the underground river, I took a quick break and embraced the cold air and mists encircling me.
前往地下河入口的途中，我快速的休整了一下，擁抱了環繞我的冷冷的空氣和霧氣。
We found a spot where we could station, anchor and go down to the entrance to the underground river, avoiding a time-consuming passage across the thick forest.
我們找到了一個地點，在這裡我們可以立足，固定錨點（anchor）然後曏下攀爬到地下河的入口，從而避免耗時的穿過濃密的森林。
Beginning in a crystal clear lagoon at the mouth of a limestone karst cave on the Philippine island of Palawan, the Puerto Princesa Subterranean River is the world's largest underground river.
普林塞薩港地下河是世界上最大的地下河，它開源於菲律賓巴拉望島上喀斯特石灰巖山洞口晶瑩剔透的瀉湖。

After the passage is over, Milton addresses Alpheus, a river god -the god who was noted for plunging the course of his river underground in order to chase the nymph Arethuse who had been turned into a fountain.
這段結束後，彌爾頓引用了河神阿爾甫斯,那位因私底下掀起河流的波浪而聞名的神,以此來與被變成海底之泉的女神阿托瑞薩相互融郃。
耶魯公開課 - 彌爾頓課程節選

It will include relaxation, group discussions, an underground river and plenty of group meals.
FORBES: Connect
The channels will not feed into the Yellow River, but will pass under the river in specially built underground channels.
NPR: River Has Long Reflected China's Glories, Sorrows