1.lowercap  2.bottomcap(head)  

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

蓋的英語翻譯：

about; annex; canopy; casing; cover; lid; shell; top; build
【化】 cap; cover; lid
【醫(yī)】 cap; coping; operculum; roof; tegmen; tegmentum; veil