a sealed book造句

1、I know a little Russian, but this is a sealed book to me.
我懂一点俄语，但这种语言对我来说如天书一般难懂。

2、The young generation was always something of a sealed book to Mr Smith.
史密斯先生始终无法了解年轻的一代。

3、Fifteenth-century art was a sealed book to him.
他对15世纪的艺术一无所知。

4、The origin of the universe is still a sealed book to us.
宇宙的起源对我们来说仍然是不可知的。

5、I know a little Russian, but this is a sealed book to me
我懂一点俄语，但这种语言对我来说如天书一般难懂。

6、Fifteenth-century art was a sealed book to him
他对15世纪的艺术一无所知。

7、The young generation was always something of a sealed book to Mr Smith
史密斯先生始终无法了解年轻的一代。

a sealed book翻译