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| Chinese | English |
| 人口演化 | demographic evolution The gradual pattern of change in the growth of human populations in a particular region or country, from a rapid increase in the birth and death rates to a leveling off in the growth rate due to reduced fertility and other factors (在特定国家或区域中人口成长的变化趋势，由快速增加的出生率与死亡率到因生育减低与其他因素影响下，成长率趋缓持平的过程。) |
| 污染演化 | pollutant evolution The process of cumulative reactive change following the introduction of a pollutant into the environment (污染物经过累积反应改变的过程后逐渐进入环境。) |