ratio of external standard

例句：

1. 1.The ratio of the population to the land area is a critical factor in determining the sustainability of the city.
   人口与土地面积的比例是决定城市可持续发展的关键因素。
2. 2.The company's financial ratios are all above industry averages, indicating strong profitability.
   该公司的财务比率均高于行业平均水平，表明盈利能力强。
3. 3. The ratio of carbon dioxide emissions to the total energy consumption has been reduced by 20% since the implementation of the policy.
   自实施该政策以来，二氧化碳排放量占能源消费总量的比例已减少20%。