◎ 底數(shù) dǐshù
(1) [base number]∶以之為基準而構成一組數(shù)或一數(shù)學表的數(shù)
一組對數(shù)的底數(shù)
(2) [the truth or root of a matter]∶事情的原委
心中有了底數(shù)

1.the truth of a matter
2.【醫(yī)】 background