同学你好，该知识点来自沪江网校《【Uni智能】雅思7分一站式VIP-大学起点【全额奖学金班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好，
同学说的by far是以下截图中的吧？ 麻烦同学下次提问的时候标注出课件的时间点，这样助助可以更快速的找到问题所在并解答。

by far，by a great amount 是非常的意思，多用于修饰比较级/最高级。同学说的到目前为止是so far。
By far modifies comparatives and superlatives, and indicates that the degree to which they exceed other compared things is very, very great. This is the best one by far. So far is a distance measurement meaning as far as this. It's often used with the TIME is DISTANCE metaphor theme to mean up until now.
希望有所帮助。