Placentogenesis
[医] 胎盘发生
🗣️ 情景例句
You have been working on this for some time, Richard.
你从事这工作已有一段时间了， Richard。
I'm afraid you will be too weak.
我怕你会太虚弱。
Though, at first, Byrd and his men were able to take a great many photographs of the mountains that lay below, they soon ran into serious trouble.
虽然开始时伯德和他的助手们拍下了飞机下面连绵群山的大量照片，但他们很快就陷入了困境。