常見例句雙語例句On the 17th day, most of the innteral cavity of cartilage cells mass gradually merged, expanded and formed primary bone marrow.誘導(dǎo)第17天，大多數(shù)軟骨細(xì)胞集團(tuán)內(nèi)部腔隙融合并逐漸擴大形成初級骨髓組織。 返回 primary marrow cavity