形容词
中文翻译：Unknown
同义词：
['enduring', 'lasting']
例句：
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1. The project is expected to be completed in six months, which is quite prolongable compared toother projects.
这个项目预计在六个月内完成，与其他项目相比相当持久。
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2.The old house has a long history and is considered to be prolongable.
这座老房子有着悠久的历史，被认为是可以长久保留的。
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3. The company's products are known for their durability and are often considered to be prolongable.
该公司的产品以其耐用性而闻名，通常被认为是可以持久使用的。