ratio of blood flow through the shunts to cardiac output

例句：

1. 1. The ratio of the population to the land is 1:10.
   人口与土地的比例是1:10。
2. 2. The ratio of sugar to water in this drink is 1:3.
   这个饮料中糖与水的比是1:3。
3. 3. The ratio of male to female students in the class is 5:6.
   班上男生与女生的比例是5:6。