就算教育被当作是职业培训，但在很多高科技领域里，技术的更新换代是非常快的。
Even if the purpose of education is job training, the exact skills change rapidly in high technology areas.
并且COTS组件产品始终处于一个完善和技术更新的循环过程中，产品的发布和版本更新的速度和频率非常快。
COTS component products undergo a technology refresh and renewal cycle. New versions or releases of COTS component products are brought to the market frequently.
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