原文:You didn't know this.您对此毫不知情。
【recognize, realize和know的区别】
recognize=know again:认识; 认出; 辨认
recognize an old acquaintance
认出一位老相识
recognize this new government
承认这个新政府
recognize sb. in the street
在街上与某人打招呼
refuse to recognize sb. any longer
不再理睬某人
recognize one's duty
认清自己的职责

realize=come to know:领悟,了解,认识到
realize on:变卖
He realized on the house.
他变卖了房子。

know:知道; 熟悉; 了解; 懂得
know sb. by sight
同某人只是面熟
know sb. at once
立刻认出某人
know right from wrong
分辨是非
know better days
过好日子

【日常用语】
Yeah, go on up, but just for a little bit.
上去吧,不过别待太久。

She can't tell them everything.
她也不能全说啊。