形容词
中文翻译：未改变的
同义词：
['unaltered', 'unchanged', 'unmodified例句：1. The weather has remained unchanged since yesterday.（自昨天起，天气一直未变。）2. The design of the new building is unchanged from its predecessor.（新建筑的设计与前一个没有变化。）']
例句：
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1. The weather has remained unchanged since yesterday.
自昨天起，天气一直未变。
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2. The design of the new building is unchanged from its predecessor.
新建筑的设计与前一个没有变化。
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3.The company's policy on environmental protection has remained unchanged for many years.
该公司对环境保护的政策多年来一直没有改变。