You have a moral dilemma.

Yeah.

The train is speeding down the tracks about to hit a group of twenty people. If you pull lever, you can divert the train to a track that would kill only the one person. Do you pull the lever?

To save twenty people, yes.

moral 道德的

dilemma 困境

tracks 鐵軌

hit 撞上

lever 操縱桿

divert 改道