so/as far as

so/as far as （表示程度、范围）远至，像……一样远，就……，据……

【例句】

◆ Nowadays the spaceships can reach outer space as far as the moon.如今宇宙飞船能够到达外层空间，最远能到月球。 

◆ I cannot run so/as far as others．我不如其他人跑得快。 

◆ As far as I know, she'll be in Beijing for two weeks．就我所知，她将在北京逗留两周。