名词
中文翻译：Unknown
同义词：
['major reconstruction', 'major restoration', 'major renovation']
例句：
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1. The roof needs a major repair to prevent leaks.
屋顶需要一次大修，以防止漏水。
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2. The car has suffered major damage in the accident.
这辆车在事故中受到了严重的损坏。
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3. The company is planning a major renovation of its office building.
该公司计划对其办公楼进行大规模翻新。