she knows是什么意思

　　The doctor told you to stay in bed, and she knows best.

　　醫生叫你臥床休息，她最清楚你該怎么做。

　　She knows that becoming world champion is going to be a long haul.

　　她知道要成為世界冠軍需要長時間的艱苦努力。

　　I have a sneaking suspicion that she knows more than she's telling us.

　　我私下懷疑，她還知道一些情況，不想告訴我們。