But that doesn 't mean the rocket goes easy on his son in batting practice .
但这并不表示火箭人会在打击练习中对自己的儿子手下留情。
You keep my body imprisoned in this cage . But I am able to transport my mind to a place far away , a happier place , where I use martian heads for batting practice .
The batting robot , which has a sensor to determine if pitches are strikes or balls , hits balls in the strike zone almost 100 percent of the time , doesn 't swing at pitches outside the strike zone , and is guaranteed to pass all drug tests .