acknowledge是什么意思?

acknowledge的中文含义详细解释：
v. 承认,答谢,告知收到,确认,报偿
acknowledge的列举例句：
She is acknowledged as the best tennis-player in the world.
她被公认为是世界最佳网球选手。

I passed her in the street but she didn't even acknowledge me when I smiled.
我在街上遇到她，可是当我向她微笑时，她却连招呼都没有向我打一个。