The cental idea of cell phones is that you should be connected to almost everyone and everything atall times.

使用手机的要义是在任何时候你都应当与几乎每一个人和每一件事保持联系。

These natural hormones, which control pain and pleasure responses in the cental nervous system, can lead to feelings of euphoria, or, what's often called, a runner's high.

这些天然荷尔蒙控制中枢神经系统的疼痛和愉悦反应，可导致欣快感，或者通常所说的跑步者的快感。