The extension frame identification code of the second mode is29bits, while that of the first mode is11bits, it can carry more information, and therefore the message efficiency is improved.

第二种通信模式的扩展帧报文的标识符为29位，多于第一种的11位标识符，利用这些多余的标识符表示报文帧的其他重要信息，从而提高报文信息的传递效率。

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This is done for efficiency, so that this time-consuming operation is not performed on the server every time a message needs to be processed.

这样做是为了提高效率，以便每次有消息需要处理的时候，不会在服务器上执行这种耗时的操作。

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Apart from its practical value, the report delivers an especially timely message. When money is tight, improving efficiency is a far better option than cutting services.

这份报告除了具有实用价值外，还传达了一个特别及时的讯息，即资金紧张时，提高效率远胜于削减服务。

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But Pistole has been under pressure from congressional lawmakers, flight crews and others concerned the change dangerously relaxed aviation security and sent the wrong message to a flying public eager for more simplicity and efficiency in passenger and bag screening.

CNN: U.S. to keep restriction on small knives on planes for now