{In this article’s an easy trick: The term “difference” requirements that more ‘f’ to ‘differentiate’ by itself from other text. Silly as it may well sound, it’s such as two ‘f’s are pals who don’t want to depart each other driving in spelling!知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题�