◎小巫见大巫xiǎowū jiàn dàwū
[like a small sorcerer in the presence of a great one——feel dwarfed;pale into insignificance by comparison;the moon is not seen where the sun shines] 小巫师见了大巫师，法术就施展不开了。比喻两者之间高下悬殊，差距太大，不能比拟
今景兴在此，足下与子布在彼，所谓小巫见大巫，神气尽矣。——汉·陈琳《答张紘书》