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Emergence of hubs in networks is also related to time. In scale-free networks, nodes which emerged earlier have a higher chance of becoming a hub than latecomers. This phenomenon is called first-mover advantage and it explains why some nodes become hubs and some do not. However, in a real network, the time of emergence is not the only factor that influences the size of the hub. For example, Facebook emerged 8 years later after Google became the largest hub on the World Wide Web and yet in 2011 Facebook became the largest hub of WWW. Therefore, in real networks the growth and the size of a hub depends also on various attributes such as popularity, quality or the aging of a node.

Emergence of hubs in networks is also related to time. In scale-free networks, nodes which emerged earlier have a higher chance of becoming a hub than latecomers. This phenomenon is called first-mover advantage and it explains why some nodes become hubs and some do not. However, in a real network, the time of emergence is not the only factor that influences the size of the hub. For example, Facebook emerged 8 years later after Google became the largest hub on the World Wide Web and yet in 2011 Facebook became the largest hub of WWW. Therefore, in real networks the growth and the size of a hub depends also on various attributes such as popularity, quality or the aging of a node.

网络中枢纽的涌现也与时间有关。在无标度网络中，较早出现的节点比后来者更有可能成为枢纽。这种现象被称为'''<font color="#ff8000">先发优势 First-Mover Advantage</font>'''，它解释了为什么一些节点成为枢纽，而一些没有。然而，在一个真实的网络中，涌现的时间并不是影响枢纽规模的唯一因素。例如，在谷歌成为全球最大互联网枢纽的8年后，Facebook出现了，并于2011年成为了全球最大的互联网枢纽。因此，在实际网络中，枢纽的增长和规模也取决于各种各样的其他特性，如节点的流行程度、质量或老化程度。

网络中枢纽的涌现也与时间有关。在无标度网络中，较早出现的节点比后来者更有可能成为枢纽。这种现象被称为'''<font color="#ff8000">先发优势 First-Mover Advantage</font>'''，它解释了为什么一些节点成为枢纽，而一些没有。然而，在一个真实的网络中，涌现的时间并不是影响枢纽规模的唯一因素。例如，在谷歌成为全球最大互联网枢纽的8年后，Facebook出现了，并于2011年成为了全球最大的互联网枢纽。因此，在实际网络中，枢纽的增长和规模也取决于各种各样的其他属性，如节点的流行程度、质量或老化程度。

== Attributes 属性==

== Attributes 属性==