First-day cover
n. 首日封
📖 牛津释义
first-day cover
envelope with a set of special stamps postmarked on the first day of issue 首日封.
🧩 词语组成解析
first
[fɝst]
n. 第一，最初;头等;一号，;[乐]高音部;
adv. 最早，最初;首次;宁愿;优先;
adj. 第一流的;最初的，最早的;基本的，概要的;高音的;
num. 第一;
day
[de]
n. 一天;白天;时期;节日;
adj. 日间的;逐日的;
adv. 每天;经常在白天地;
🗣️ 情景例句
Didn't you give them to Richard?
你不是把它们交给Richard了吗？
Looking back, it seems like a very short five years living here and working together with you.
回顾一下，在这里和大家一起工作的五年看起来是那么短暂。
Did you give our English teacher a card for Teachers' Day?
你给了我们的英语老师教师节贺卡了吗？