名词
中文翻译：Unknown
同义词：
['extended period', 'extended duration例句：1. The project has a long-term goal of reducing carbon emissions.（该项目有长期目标，即减少碳排放。）']
例句：
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1. The project has a long-term goal of reducing carbon emissions.
该项目有长期目标，即减少碳排放。
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2.The company plans to extend its production line for the next six months.
该公司计划将生产线延长六个月。
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3. The research aims to extend our understanding of the ecosystem's dynamics.
这项研究旨在拓展我们对生态系统动态的理解。