形容词
中文翻译：长期的
同义词：
['enduring', 'lasting', 'persistent']
例句：
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1.The tradition of the festival has been longstanding for over a century.
这个节日的传统已经持续了一百多年。
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2. The company's commitment to sustainability has been longstanding since its inception.
这家公司对可持续发展的承诺自成立之初就已存在。
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3.The issue of climate change is a longstanding concern that requires urgent action.
气候变化的问题是一个长期存在的关切，需要紧急行动。