Placentogenesis
[医] 胎盘发生
🗣️ 情景例句
That must be Nat.
这一定是Nat。
They have been much too irresponsible for their high position.
他们虽身居要位，未免太缺乏责任感了。
Long ago, people believed that the world was flat.
很久以前人们相信地球是平的。