Warning: file_put_contents(/www/wwwroot/ppbbbu/n94.cn/cache/de0d5280fe633433fa475ee8fbb3db3d.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/n94.cn/index.php on line 55 base period英英字典_base period剑桥英语解释_base period柯林斯英文解释_94生活常识网有道词典
1. N a neutral period used as a standard for comparison in constructing an index to express a variable factor: 100 is usually taken as the index number for the variable in the base period 基准期[statistics]