Most grass embryos have a flap - like structure known as the epiblast.大多数禾本科胚有一片瓣 状 结构通常称为外胚叶....

n.外胚叶（成为外胚叶），外胚层...

epiblast的音标：epiblast的英式发音音标为：['epɪblæst]epiblast的美式发音音标为：['epəˌblæst]...