如果你真是一个牛人的话，试着在脚上系个健身实心球，或是在双杠上练习悬垂举腿，把腿一直举到双杠上面。
If you're truly a monster, try doing leg lifts with a medicine ball hanging from your feet. Or hang from a pull up bar and raise your legs in front of you all the way up to the bar.
尽量在发球时每次都把球抛到相同的位置，然后将球拍举到头后方，瞬间击球。
Try to toss the ball into the same spot every time? Let your racket head drop behind you and then hit the ball suddenly.
乒乓球，再举一个例子，就是我们所关心的几乎所有的时间。
The table tennis, for another example, is what we care about almost all the time.
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