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Top 10 amazing holes in the Earth
In man's search for mineral wealth, many enormous holes have been dug. In addition, nature occasionally produces some astounding holes. This list is a pick of the ten most spectacular natural or manmade holes in the face of the earth.
人類在挖礦石時經常會挖掘出非常巨大的礦洞，此外，自然界有時會形成令人驚嘆壯觀的洞穴，以下是美國媒體列舉的地球表面最壯觀的自然或人為洞穴。
1. Darvaza Gas Crater-Turkmenistan 土庫曼斯坦達爾瓦扎天然氣坑洞
In 1971, geologists discovered a massive underground deposit of natural gas on this site. Whilst excavating the hole to tap the gas, thedrilling rig collapsed leaving a massive hole. To prevent poisonous gasses from escaping, the hole was allowed to burn. It continues to burn to this day and has done so without ceasing.
1971 年，地質學家發現該區域蘊藏著大量的地下天然氣，在常年的開采過程中，由于不慎出現鉆探環狀坍塌，從而形成了一個非常大的坑洞。為了防止有毒氣體溢出，土庫曼斯坦政府允許對坑洞中的天然氣進行燃燒，這個坑洞從白天到晚上一直處于熊熊烈火燃燒狀態。因此，這處燃燒的天然氣坑洞也被人們稱為 “地獄之門”。
