查到了上下文,
The ability to prioritize balance. Work hard, play hard. Despite what you may have heard, this place is NOT all about work. To be successful here, you must prioritize some measure of down-time. Therefore we like to see that you've prioritized some down-time in high school as well.
从Merrium Webster 韦氏词典查到的意思是
inactive time (as between periods of work)
这句话的意思是,
如果想在这成功的话,你得知道怎么对学习之外的闲暇时间进行优先级排序（指合理安排时间,达到时间管理的最优化）.所以麻省理工大学想要知道你在高中时是怎么安排课余时间的.