I need to practice hard and for long periods of time in order to obtain the best results the least error. Because the actual race time takes a few seconds, we do not have rights to modify it.
I have to train hard and long to achieve the best possible errors to a minimum. Because during the actual competition takes a few seconds we do not have permission to edit it.
I have to work hard and long to get the best performance error is minimal. Because at the time the real race takes a few seconds, we have no right to edit it.