1. After enough hops, there will be only one host address on each destination list. Then the packets could be treated as common packets of unicast.
我们可以这样理解：当有发往多个目标的分组在开始的时候沿相同路径传送时，其中一个分组承担网络费用，其他分组搭便车。
2. On the basis of the introduction of some common and the latest detection methods of beer spoilage bacteria, the significance of hops antibacterial mechanism for the detection of beer spoilage bacteria was put forward. Finally, the development trend of beer spoilage bacteria detection was predicted.
通过介绍一些常用和最新检测啤酒腐败菌的方法，论述了酒花抗菌机理对啤酒腐败菌检测的影响意义，展望了啤酒腐败菌检测的发展趋势。