Allantoic placenta
[医] 尿囊胎盘
🧩 词语组成解析
a. [动]尿囊的,尿囊内的,有尿囊的
placenta
[plə'sentə]
n. 胎盘，胎座;
🗣️ 情景例句
No. It's not.
不是。
What will you do this weekend?
这周末你将干什么？
Then knowledge began to be accumulated according to a systematic plan.
于是，知识便开始有系统有计划地积累起来。