sacrum 【医】 hier-; hiero-; jew bone; ossa sacrum; resurrection bone; sacral bone sacrum; vertebrae magnum
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