底质

底的英语翻译：

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

质的英语翻译：

character; matter; nature; pawn; pledge; quality; question; simple
【医】 mass; massa; quality; substance; substantia
【经】 guilder