Esperanto also has a highly productive system of constructing new words from old ones.

世界语同样有一套高产的新词生成系统，即从旧词中生成新词。

And the long-run stability or instability of prices will depend on the strength of the upward trend ofthe wage-unit (or, more precisely, of the cost-unit) compared with the rate of increase in the efficiency of the productive system.

价格的长期稳定性或不稳定性将取决于工资单位（或更准确地说，成本单位）上升趋势与生产系统效率增长率相比的强度。