Mesectoblast
中外胚层, 外中胚层
🗣️ 情景例句
I know.
我知道。
How annoying!
真讨厌！
On his return to India he had the chance to travel to South Africa to work on a law case.
一回到印度，他就得到一个去南非办理一桩法律案件的机会。