一日一成语【59】an open/a closed book

an open / a closed book

an open book – 一本找天的书。一本打开的书，人人可读，书中的内容尽可一览无遗，因而没有神秘或言。这样的一本书便就用来比喻坦诚的人或公开的事，这样的人或事清澈如水，毫无不可思议之处。与此截然相反的是a closed book或a sealed book – 一本合起来的书，它意味着神秘和未知：

The dense dark jungle, obviously a closed book to an outsider, is an open book to the aboriginals.
黑暗稠密的丛林，对外来者显然是神秘莫测的，但对土著来说却毫无神秘可言。

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。

My life experience has been very simple. It is an open book to every colleague of mine.
我的生活经历很简单，我的每一位同事都十分清楚。