He threw a stone at the dog.

Tom can swim no more than a stone can.

The boy threw a stone at the frog.

In the countryside, the breaths of the grass, the trees, and the rocks have the foul smell of humans. They call to me from all directions, and they cling to me. But in the city, even the passengers of a jam-packed train are as quiet as pebbles on the riverbed, and everyone is only thinking of themselves.