Warning: file_put_contents(/www/wwwroot/ppbbu/28094.com/cache/98326f881dacbac983d150469bb21f0f.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/28094.com/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_贰靶汉英词典
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 基準期[statistics]