Mesectoderm
中外胚层
🗣️ 情景例句
It's 5:00 p.m. today.
今天下午5点整。
Mr. President, ladies and gentlemen, and all the distinguished guests.
主席先生，女生们先生们，各位贵宾们。
When we later walked down the main street of the villager, we were followed by a silent procession of children.
后来，我们在村里的主要街道上行走的时候，一队默不作声的孩子跟在我们后头。