“预约保险单”的概念、定义、翻译、参考文献-科学参考

单词	预约保险单
释义	预约保险单 Encyclopedia 经济学保险单释 open policy预约保险单保险双方对预计的保险标的在期初签发的保险单。约定承保条件，并于期末根据实际情况调整保险合同。又称开口保单、敞口保单。
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科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。