名词
中文翻译：主要调查
同义词：
['major study', 'major examination例句：1. The government is conducting a major investigation into the cause of the fire.（政府正在对火灾的原因进行重大调查。）']
例句：
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1. The government is conducting a major investigation into the cause of the fire.
政府正在对火灾的原因进行重大调查。
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2.This is a major investigation that could have far-reaching consequences.
这是一项可能产生深远影响的大规模调查。
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3.The police are conducting a major investigation into the murder case.
警方正在进行一项针对谋杀案的大规模调查。