Postcard （明信片） I bought a postcard of the Eiffel Tower and mailed it home from Paris. 我买了张埃菲尔铁塔的明信片，在巴黎寄回了家。 Email （电子邮件） I sent an email to my professor to confirm the meeting time. 我给教授发了封邮件确认会议时间。