指出实现目标替代率的关键之一是工资增长率应和个人账户记账利率相等；
The key to guarantee this rate in system is to make equal the growth of wage and the individual account interest.
用表达式表达的话，单位劳动力成本的增长率基本上与工资增长率成正比，与劳动生产率成反比。
Expressed in growth rates unit Labour costs are roughly equal to growth in wages minus the growth in Labour productivity, per widget.
对此的解释是生产率的涨幅远远高于工资增长率，而事实上随着工业企业单位劳力成本的削减，生产率的增幅每年都在20%以上。
The explanation is that productivity has grown even faster than wages, expanding by 20% a year in industry, cutting unit labour costs.
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