How far is it from A to B?为什么等于How far is B from A?而不是How far is A from B呢?
【答】 from 的意思是“从”。所以,以下句子的意思应该是:
How far is it from A to B?从A 到 B有多远?
How far is B from A?从A 到 B有多远?
How far is A from B.从B到A有多远?