一个不同的世界！(A different world!)

你能想象跌跌撞撞地发现一个隐藏在世界上的巨人吗？1991年，一名越南伐木工人就是这样。在越南的Phong NHA-Kòbáng国家公园，他发现了我们现在所知道的地球上最大的洞穴Hang SònĐoòng的入口。这个地质奇观有一个长近5公里、宽150米、高200米的主画廊，宽敞到可以容纳40层的摩天大楼，里面有“越南长城”等地层，方解石屏障高60多米。它甚至有自己的天气系统，在里面制造云层。但这座雄伟既脆弱又令人印象深刻：每年只有1000名幸运儿可以探索它，从而保护其独特的生态系统。
原文：
Can you imagine stumbling and discovering a giant hidden in the world? In 1991, a Vietnamese lumberjack was like this. In Phong NHA-K ò b á ng National Park in Vietnam, he discovered the entrance to Hang S ò n Đ o ò ng, the largest known cave on Earth. This geological wonder has a main gallery that is nearly 5 kilometers long, 150 meters wide, and 200 meters high. It is spacious enough to accommodate a 40 story skyscraper and contains strata such as the "Great Wall of Vietnam". The calcite barrier is over 60 meters high. It even has its own weather system that creates clouds inside. But this magnificent structure is both fragile and impressive: only 1000 lucky ones can explore it every year, thus protecting its unique ecosystem.
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