教一个小学生去死背他们需要掌握的每一个单词，看来真是一项浩繁的任务，可更像要一个孩子铲掉一大堆沙子，却不给他铲子。
It seems a gargantuan task to teach a pupil to memorize every word he needs to know, much as if the child were being asked to shovel a huge pile of sand, with the shovel shut away.
该系统可优化滚刀设计参数，自动校核齿背铲磨，实现齿轮刀具快速可靠的设计。
This system can optimize the parameter of gears, check relief grinding of tooth back automatically and design the gear hobs rapidly and reliably.
该系统可优化滚刀设计参数，自动校核齿背铲磨，实现齿轮刀具快速可靠的设计。
This system can optimize the parameter of gears, check relief grinding of tooth back automatically and design the gear hobs rapidly and reliably.
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