名词
中文翻译：主题
同义词：
['object', 'matter', 'topic']
例句：
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1. The teacher asked us to writea report on the subject of global warming.
老师要求我们写一篇关于全球变暖的报告。
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2. The student's performance inthe subject was excellent.
学生在学科上的表现非常出色。
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3. The researcher focused onthe subject of artificial intelligence.
研究者专注于人工智能这一课题。