base period
柯林斯詞典
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(zhǔn)期[statistics]
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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(zhǔn)期[statistics]