由英文（Extension）翻译而得来。在斯诺克比赛中，加在球杆尾部的一根短短棒用于增加球杆长度，当主球远离选手时帮助选手击打主球。
在那里，加长把赦免令递给吉米。
因此，如果你注意到在一天里会有很多功课要做的话，不如把间隔缩短或者加长几天。
Therefore, if you notice that a repetition should be scheduled on a day that has already been packed with many pages, you can shorten or lengthen the interval by few days.
但是，一个更加积极的步骤想必会让旧电脑运行得更加长久，就是像人们常说的那样——把它们送给别人去用吧。
But an even more positive step would surely be to keep our computers in circulation longer by passing them on to someone else - or so we are often told.
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