They've been in a very terrible trolley car wrack .

他们在一场严重的电车事故中受伤。

How many would turn the trolley car onto the side track?

多少人会把电车开上另一条轨道？

So you can turn the trolley car, if you want to, onto the side track.

所以你可以选择把电车拐向那条分岔路。

You've control over that whereas you may not control over the trolley car.

你有能力选择推还是不推，但你没办法控制的电车不撞向大家。

The trolley car is a runaway thing and you're making a split second choice.

电车失控了，而你是在瞬间做出决定的。