furthest:
adv. 最远地；最大程度地，比较先进的（同 farthest）
adj. 最远的；最大程度的（同 farthest）
The risk of thunder is greatest in those areas furthest from the coast.
遭雷击的危险在离海岸最远的那些地区最大。
The south, where prices have fallen furthest, will remain the weakest market.
价格降幅最大的南方仍将是最疲软的市场。
fathest:
Tom's home is the fathest from school in his class, so he goes to school by bus. It takes him half an hour.
汤姆的家离他的学校世界上最遥远，所以他乘公共汽车上学花费他半个小时。
