Pregastrulation
原肠形成前期
🗣️ 情景例句
We haven't heard from him for weeks but we're still hoping for a letter.
我们已经有几个星期没有他的消息，但仍然盼望着他的来信。
Deeds are fruits,words are but leaves.
行动是果实，言语只是叶子。
Where do you work?
你在哪上班？