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
Front Desk. Can I help you?
前台，需要我为您服务吗？
How many pieces are you going to take?
你要拿几支？
but I can't decide yet.My wife must see it first.
但我还不能决定。我妻子必须先来看一看。