Wu was China's only female emperor, and she exercised her power by introducing many reforms.

His father was the state's only emperor, Ran Min.

For a while, Japan seemed suspended in time, forced to face the prospect of life without the only emperor most of the nation had ever known.

The only emperor is the emperor of ice-cream.

Thus Theodosius became the only emperor.

Your worm is your only emperor for diet.

The only emperor in the world today is the ruler of Japan.

Trieu Da agreed to recognize the Han ruler as the only emperor.

The only emperor is the emperor of ice cream.

In world politics, he is the only current emperor.