a closed book
英
美
- a art.一(个)；每一(个)；任一(个)n.英语字母表的第一个字母；学业成绩得优者；表示“最好”的符号
- book n.书；本子v.预订；记录在案
- closed adj.关闭的；封闭的；停业的动词close的过去式和过去分词.
- Fishing is a closed book to me.
我对钓鱼是一窍不通。
- Nuclear physics is a closed book to me.
核物理学是我完全不懂的一门学科。
- Nuclear physics is a closed book to most of us.
我们大多数人对原子核物理学一窍不通。
