First-day cover
n. 首日封
?? 牛津釋義
first-day cover
envelope with a set of special stamps postmarked on the first day of issue 首日封.
?? 詞語組成解析
first
[f?st]
n. 第一，最初;頭等;一號，;[樂]高音部;
adv. 最早，最初;首次;寧愿;優先;
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;時期;節日;
adj. 日間的;逐日的;
adv. 每天;經常在白天地;
??? 情景例句
Yes. I'd like to make a loan.
是的，我想辦一筆貸款。
I think I'll try out for the Drama Club.
我想在戲劇俱樂部試試看。
Its wool, which had been dyed black, had been washed clean by the rain!
原來羊毛上染的黑色被雨水沖掉了！