can't make head nor tail of something idiom (US also can't make heads or tails of something)
无法理解，搞不懂
to not be able to understand something
I can't make head nor tail of these instructions on the packet. 我搞不懂包装上的说明。
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。