送交者: Enlighten 于 2008-01-09, 10:32:38:
回答: 登这个原文是不合适 由 师太 于 2008-01-09, 10:26:58:
For example, you can pay to get weather forecast messaged to your cell phone, the charge is for the convenience of delivery, not for the content, because you can easily get the forecast on line for free.