base period

英 [beɪs 'pɪərɪəd] 美 [beɪs 'pɪriːəd]

• 地下径流时期,基准期,基本周期

base period的用法和样例：

例句

1. A level for farm-product prices maintained by governmental support and intended to give farmers the same purchasing power they had during a chosen base period.
   平价制度为保证在选定的基期内农民具有相同的购买力而主要由政府支持的农产品价格水平