【化】 substrate maintenance constant

底的英語翻譯：

a copy kept as a record; base; bottom; end; fundus; the truth of a matter
【醫(yī)】 base; basement; bases; basi-; basio-; basis; batho-; bathy-; fimdi
floor; fundus; pavimentum; solum

物的英語翻譯：

content; matter; substance; thing
【化】 object
【醫(yī)】 agent

維持的英語翻譯：

maintain; carry through; hold out; keep; last; manage; preserve
【化】 make good

常數的英語翻譯：

constant; invariable
【計】 C
【化】 constant
【醫(yī)】 constant
【經】 constant