如果在负载数据前添加多于一个消息头时，它们以同样的方式链接在一起，如上面图3Format字段所示。
If more than one header is prefixed to the payload data, they are chained in the same way, as shown in Figure 3 above by the Format field.
如果在负载数据前添加多于一个消息头时，它们以同样的方式链接在一起，如上面图3Format字段所示。
If more than one header is prefixed to the payload data, they are chained in the same way, as shown in Figure 3 above by the Format field.
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