You're walking by the side of the road and you're hit by a truck, or you're trying to to jump on a moving train, you're late for work, and your pant leg gets caught.
你正在路边上走着 然后被一辆卡车撞到， 或者你想尝试跳到一节行进的火车上， 你上班迟到了，裤腿却被攫住了。