Does this thing have a reverse gear?

【gear】这玩意儿有倒挡吗？

'Leave the ambulance alone, ' he yelled at the men, over the whine of the ambulance's reverse gear.

“别管救护车， ” 他冲着这些人大喊，盖过了救护车倒档的呜呜声。

It is as if we are always at an intersection  of the past and future, given a steering wheel, a dashboard of dials, and a kill switch, but not  given a brake, an accelerator, a reverse gear, a map, or a navigation system.

就好像我们总是处于过去和未来的交汇处，有一个方向盘、一个表盘和一个终止开关，但没有给刹车、油门、倒档、地图或导航系统。