名词
中文翻译：Unknown
同义词：
['prolongation', 'expansion例句：1. The bridge is an extension of the road.（这座桥是道路的延伸。）']
例句：
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1. The bridge is an extension of the road.
这座桥是道路的延伸。
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2.The company's growth is a natural extension of its existing business.
该公司的增长是其现有业务的自然扩展。
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3. The scientist made an extension to his theory.
科学家对他的理论做出了扩展。