名词
中文翻译：长期协议
同义词：
['long-term contract', 'long-term partnership']
例句：
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1. The company reacheda long-term agreement with the government to invest in renewable energy projects.
该公司与政府达成了一项长期协议，以投资可再生能源项目。
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2. The two companies have signed a long-term agreement for joint research and development.
两家公司已签署一项长期协议，进行联合研究和开发。
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3. The agreement will last for five years and is expected to benefit both parties significantly.
该协议将持续五年，预计将对双方产生显著的益处。