Imagine you re watching a runaway trolley barreling down the tracks straight towards five workers who can t escape.You happen to be standing next to a switch that will divert the trolley onto a second track.Here s the problem. That track has a worker on it, too, but just one.What do you do? Do you sacrifice one person to save five?

这就是我们所说的电车难题，是由哲学家菲利帕·福特在1967年提出的道德困境问题。

This is the trolley problem, a version of an ethical dilemma that philosopher Philippa Foot devised in 1967.

来自中国浙江的十岁女孩张茹伊在一次英语演讲中，探讨这个难题。演讲口语流利，毫不怯场，让老外赞叹不已。