Ectosac
[医] 外膜, 外囊(卵)
🗣️ 情景例句
The important thing is that you tried.
重要的是你已经努力过了。
Sure. We are friends since primary school.
当然，我们从小学就是朋友了。
New China was founded in l949.
1949年新中国成立。