Enteroderm
消化道内胚层
🗣️ 情景例句
Here.
这里 。
How often do you eat out?
你隔多久在外面吃一次饭？
The morning passed rapidly and Frank was about to leave when he noticed a large packing case lying on the floor.
上午很快过去了，弗兰克正准备离去，突然看见地板上放着一只体积很大的货箱。