A master race的用法和样例：
- A master race.
- They haven't created a master race because only a tiny number of women have wanted to impregnate themselves this way.
- The Nazis offered incentives to German women to bear many children and introduced the Lebensborn programme to create a master race of blond, blue-eyed children.
- A great poet is a master melody.
- I wish I could be a master of this subject.
- He have a master's degree in business science.