名词
中文翻译：地下宫殿
同义词：
['subterranean palace', 'underground mausoleum', 'subterranean tomb']
例句：
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1. The underground palace is a popular tourist attraction in the city.
这个地下宫殿是该市的一个热门旅游景点。
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2.The underground palace was discovered during the construction of a new highway.
在修建一条新高速公路的过程中，发现了这个地下宫殿。
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3. The underground palace was built over 2000 years ago and has been untouched since then.
这个地下宫殿建于2000多年前，自那时起一直未被打扰。