Strata externum
[医] 外层
🧩 词语组成解析
strata
['streitə]
n. 地层;岩层( stratum的名词复数 );地层;社会阶层;
🗣️ 情景例句
It's been a pleasure to talk to you.
和你谈话是件很愉快的事。
Shall we go to the cinema?
我们去看电影好吗？
I was very glad when the boys won the relay race.
我非常高兴，男同学在接力赛中获胜。