【醫(yī)】 basal ectoderm

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

外胚層的英語翻譯：

【醫(yī)】 animal-germ layer; dermal layer; ectoblast; ectoderm; epiblast
neurodermal layer