形容词
中文翻译：长期的
同义词：
['permanent', 'long-lasting例句：1. The project will take a year-long effort to complete.（这个项目需要长期的努力才能完成。）']
例句：
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1. The project will take a year-long effort to complete.
这个项目需要长期的努力才能完成。
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2. The company has been in operation for over a year-long.
这家公司已经运营了一年多。
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3. The relationship between the two countries is known to be long-lasting.
两国之间的关系众所周知是长久的。