Ectomesoderm
外中胚层
🗣️ 情景例句
I have been talking to a group of salesmen
我一直在与一群推销人员谈话
Curiosity killed the cat.
好奇心，惹祸根。
to study his image in the sight of those who do not know him,
企图用不了解自己的人的观点来研究自己塑造的形象的作法，