Zài / tǐ / wài / péi / yǎng / guò / chéng / zhōng / pēi / pào / huì / zhú / jiàn / xíng / chéng / nèi / bù / xì / bāo / tuán

在体外培养过程中，胚泡会逐渐形成内部细胞团。

During in vitro cultivation, the blastocyst gradually forms an inner cell mass.