Ectomesoderm
外中胚层
🗣️ 情景例句
I feel that too many people worry about how they look.
我感觉太多的人关注他们的外表。
It'll probably clear up this afternoon.
今天下午可能放晴。
In a short time I was busy mixing butter and flour and my hands were soon covered with sticky pastry.
不一会儿我就忙着调拌起了黄油和面粉，很快我的手上就沾满了粘粘的面糊。