名词
中文翻译：子域
同义词：
['subdomain', 'sub-region']
例句：
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1. This domain is responsible for managing the entire website's content.
这个子域负责管理整个网站的全部内容。
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2. The sub-region has a population of 500,000 people.
该子区域有50万人的人口。
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3. The sub-region is known for its beautiful natural scenery.
该子区域以其美丽的自然风景而闻名。