如果你存储了字段，但是在查询时根本没有用到它们，那么别存储它们。
Turn off any features you are not in fact using. If you are storing fields but not using them at query time, don't store them.
当有错误发生时，友好些，并且对客户有用些- - -别告诉客户说“你查询的航班不存在”。
When something goes wrong, be nice, and be helpful-don't tell the user, "I couldn't find any flights for your search".
别挂断电话，稍等一会儿，我来查询一下这信息。
程序具备网址分门别类功能，同时可监控贴条，收发邮件，查询指定网址等。
Program Web site category, with features, while monitoring stickers, send and receive mail, check the specified URL and so on.
程序具备网址分门别类功能，同时可监控贴条，收发邮件，查询指定网址等。
Program Web site category, with features, while monitoring stickers, send and receive mail, check the specified URL and so on.
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