first-day cover
noun /ˌfɜːst deɪ ˈkʌvə(r)/
/ˌfɜːrst deɪ ˈkʌvər/
- a specially printed envelope with a stamp that has a postmark with the date that stamps of that design were first sold
| 单词 | first-day cover |
| 释义 | first-day covernoun /ˌfɜːst deɪ ˈkʌvə(r)/ /ˌfɜːrst deɪ ˈkʌvər/
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