debenture bonds

例句：

1. 1.The company issued a series of debenture bonds to fund its expansion plans.
   该公司发行了一系列无担保债券以资助其扩张计划。
2. 2.Investors are wary of the risk associated with debenture bonds due to their high default rates.
   由于违约率较高，投资者对无担保债券的风险持谨慎态度。
3. 3. The government has been using debenture bonds to finance infrastructure projects, which have helped boost economic growth.
   政府使用无担保债券来融资基础设施项目，这有助于促进经济增长。