Senses
底数/ 底數 base number
the base of a power or logarithm, such as 'a' in 'a to the power of three'; also refers to the radix in a numbering system
底数/ 底數 the facts
the truth or root of a matter; the underlying facts or background of a situation
底数/ 底數 minimum amount
the minimum required number or lowest possible price; a base figure