Gastrocoel
[医] 原肠
🗣️ 情景例句
I don't know haw that could have happened.
我不知道怎么会发生那样的事。
This is my fourth year of college, I'm a senior.
这是我上大学的第四年，我是四年级学生。
Are you sure you sent the full order?
你确定货全部都出来了？