If you don*t ( ) (提示：know the meaning of ) me ,i*ll say it again.

If you don*t ( ) (提示：know the meaning of ) me ,i*ll say it again.
If you don*t ( ) (提示：know the meaning of ) me ,i*ll say it again.

If you don*t ( ) (提示：know the meaning of ) me ,i*ll say it again.
understand

understand 理解；懂得

understand