🧩 词语组成解析
placenta
[plə'sentə]
n. 胎盘，胎座;
🗣️ 情景例句
You must be excited.
您一定很兴奋。
The President is going to address the nation on television this evening.
总统今晚将向全国发表电视讲话。
What will be the population of these countries by the end of the twentieth century?
到20世界末较发达国家的人口将是多少？