be Greek to one

• 为某人所不能理解的；一窍不通；不懂；无法了解

be Greek to one的用法和样例：

例句

1. Physical chemistry is Greek to me.
   我对物理化学一窍不通。
2. When it comes to German, I know nothing.
   谈到德语，我一窍不通。
3. Do not coin terms that are intelligible to nobody.
   不要生造谁也不懂的词语。
4. Don't use abbreviations that no one understands.
   不要使用谁都不懂的缩写词。
5. I've never been able to work her out.
   我一向无法了解她。
6. One requirement is that researchers have no access to individual patients' identities.
   其中一项要求是研究人员无法了解病人的身份。