The homeless sleep in doorways and stations - we step over their bodies like so much human flotsam.无家可归的人睡在门口和车站——我们跨过他们的身体时就好像他们的存在毫无意义。Tell Jim to step over to my office.让吉姆到我办公室来一下。He would dive under one obstacle, round another, and lightly step over a third.他会从一个障碍的下面冲过去，绕过另一个，再轻轻地跨过第三个。