名词
中文翻译：Unknown
同义词：
['unrefundable bonds', 'non-refundable securities']
例句：
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1. The companyissued non-refundable bonds to fund its expansion plans.
该公司发行了不可退款债券以资助其扩张计划。
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2.The government has introduced a new policy that makes non-refundable bonds mandatory for all public projects.
政府推出了一项新政策，要求所有公共项目都必须使用不可退款债券。
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3. The investors were given the option to purchase non-refundable bonds with their cash contributions.
投资者被提供了用他们的现金捐款购买不可退款债券的选择。