He is saying the batter is charged with a strike and still at bat.
If a ball hits any part of the body (including hair and hands) then the ball is dead. If the batter swings or is hit in the strike zone, it is a strike. If the batter does not attempt to move, and the ball is outside of the strike zone then it is a ball. If the batter attempts to move and does not swing then it is a hit-by-pitch and the batter is awarded first, and all forced runners advance.
I think that is all of the possible situations for a hit batter.
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