名词
中文翻译：间谍
同义词：
['spy', 'informant']
例句：
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1. The spy was able to gather information that helped the government solve the case.
这名间谍成功收集到了有助于政府解决案件的信息。
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2. The informant provided crucial details that led to the arrest of the criminal.
情报员提供了关键细节，导致犯罪嫌疑人被捕。
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3. The spy network was so sophisticated that it could operate in secret for years without detection.
这个间谍网络非常先进，可以在不被发现的情况下秘密运作多年。