Mesectoderm
中外胚层
🗣️ 情景例句
I'll get through this work by noon.
我会在中午以前完成这项工作。
Have you invited any boys?
你邀请男孩吗？
When she caught up with them, she saw that they had sat down and were going through the contents of the bag,
当她赶上他们时，发现他们已经坐了下来，正翻着包里的东西。