There's a new creature roaming the streets: the petextrian, or texting pedestrian.

大街上游荡着一个新的群族：行走短信族，也就是边走边发短信的行人。

You know him by his hunched-over posture, staring at a blazing screen while weaving down the street. Sometimes his gait slows, sometimes speeds up. He almost runs into a street sign here or trips on a curb there.

颈背前弓，一边在街道穿行，一边紧盯着屏幕。凡是这样姿势的人，都是行走短信族。他们的步伐偶尔会减缓，有时又会加快。有时会差点撞到路牌，有时又会撞到旁边的马路牙子。

He doesn't look scary, but he might present a danger - both to himself and others.

他们自己并不觉得有什么可怕，但其实，他们的行为对自己和他人都有潜在危险。