Click the add button in the bottom left corner of the Network pref pane to add Bluetooth as a connection option.

左下角的那个+号，添加，选择蓝牙。

A common property of many large networks is that the vertex degrees follow a scale-free power-law distribution, the BA model features two generic mechanisms: the networks expanding and the pref.

实际网络中节点分布的一个广泛特征是度的无标度幂率分布，BA模型认为形成这种特征的两个主要因素是网络增长和节点间的偏好连接。