1. 电子邮件   laptop, portable computer   phone booth   channel   e-mail   Hint Half-n-half Clue   2. 电传机   telex   television broadcasting   phone booth   postage stamps   Half-n-half Clue   3. 流动   radio broadcasting   mobile   postman, mailman   public telephone   Half-n-half Clue   4. 航寄   aerial   postage   airmail   news bulletin   Half-n-half Clue   5. 信箱   public telephone   aerial   letter box   phone booth   Half-n-half Clue   6. 计算器   public telephone   letter box   radio broadcasting   calculator   Half-n-half Clue   7. 膝上计算机，便携式计算机   modem   channel   airmail   laptop, portable computer   Half-n-half Clue