letter:n. 信；字母，文字；证书；文学，学问；字面意义vt. 写字母于vi. 写印刷体字母Your letter was very welcome.很高兴收到你的信。

I returned the letter unopened.我原封不动地将信退了回去。You haven't signed the letter.这封信您还没有署名。There's no date on this letter.这封信未注明日期。She wrote me a vicious letter.她给我写了一封严厉的信。card:n. 卡片；纸牌；明信片vt. 记于卡片上Simon's a whiz at card games.西蒙是纸牌游戏的高手。Did you get my card from Italy?你收到我从意大利寄出的明信片了吗？Here's my card. You may need me.这是我的名片。你可能会需要我。