习语：
an open book
讲解：
an open book 字面意思是“打开的书”，引深为“尽人皆知的事情，毫无秘密或隐瞒的事”。
支持范例：
We have no secrets, he is like an open book to me.
我们之间没有秘密, 他是个率真的人。
My life is an open book and I have no secret.
我的生活很明了，没有秘密可言。
David Munyon's a very complicated guy on the one hand, but an open book on the other.
David Munyon一方面是一位复杂的人，另一方面也是一位极坦率的人。
迷你对话：
A:What? You golden watch is lost?
什么？你的金表丢了？
B:Yeah. I just can't find it anywhere.
是呀，我刚才都找遍了也没找到。
A:It's an open book that it was stolen by the man in black.
很明显是那个穿黑衣服的人偷走了。
Bet's get it back.
那我们去找回来。作者: dragon520 时间: 2012-8-12 15:58
It's an open book that our "big ball items" will have a long time to promotion.
et's get it back.