He doesn't waste even a single grain of rice.

He knows nothing about that one case.

I saw a dog in the park.

I saw one dog in the park.

He ate a slice of bread.

In ancient China, shaku was an important unit.

He picked up a fig and gently peeled off the skin.

Your one vote will determine our victory.

His success is the result of his personal efforts.

He threw a handful of sand into the sea.