trolley pole

例句：

1. 1. The trolley pole is the only way to get around in this busy city.
   手推车杆是在这个繁忙的城市里唯一可以通行的方式。
2. 2.The old man was leaning on his trolley pole as he walked along the street.
   老人靠在手推车上，沿着街道散步。
3. 3.The kids were playing with their trolley poles when they heard the siren.
   孩子们听到警笛声时，正在用他们的手推车玩。