Blastodisk
[医] 胚盘, 胚层
🗣️ 情景例句
I am sorry. I am not free right now.
对不起，我现在很忙。
Jack grew timid when he saw the size of the shoes on the front step.
杰克看到了放在玄关的鞋子的尺寸时，甚为吃惊。
I'm afraid it's empty.
恐怕盒子是空的。