最高君主

例句：

1. 1. The emperor is the highest monarch in the country.
   皇帝是国家的最高统治者。
2. 2. The king is the head of state and the highest monarch in the country.
   国王是国家的元首，也是最高统治者。
3. 3. The president is the head of government and the highest monarch in the country.
   总统是国家的政府首脑，也是最高统治者。