Growth trend of population

In the longer term, it should strive to raise Japan’s trend rate of growth, which many reckon has fallen to about 1% a year from 1.5-2% previously, as the population shrinks.

许多人认为，随着人口的减少，其增长率已经从前年的1.5-2%下降到1%左右。

The biomass of spruce population showed a similar trend, though the period of relative slow-down of growth continued from 30 to 50 years.

云杉种群生物量表现出类似的增长，但林龄在30至5 0年间增长速度减慢。

Part III: forecasting the trend of the population growth in Zhengzhou in future 50 years and analysis of the result.

第三部分：对郑州市未来50年人口发展趋势进行预测，对预测结果进行分析。