名词
中文翻译：地下安装
同义词：
['underground installation', 'underground installation system']
例句：
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1. The constructioncompany is installing the new elevator overground.
建筑公司正在地面上安装新电梯。
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2.The underground installation system was designed to improve energy efficiency.
地下安装系统旨在提高能源效率。
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3.The engineers were tasked with installing the new lighting system overground.
工程师们被指派在地面上安装新的照明系统。