Pregastrulation
原肠形成前期
🗣️ 情景例句
If you roughhouse with a cat, you're going to get scratched.
如果你喜欢和猫嬉戏，可能会被爪子抓伤。
It doesn't work.
坏了；不动了。
That's a big box. Is it heavy? Please let me help you.
这是个大盒子。重吗？让我来帮你。