A black-and-white book lies next to a candle and a clockA black-and-white book lies next to a candle and a clock
The balls roll down an inclined plane. vector graphicsThe balls roll down an inclined plane. Vector graphics
A black-and-white book lies next to a candle and a clockA black-and-white book lies next to a candle and a clock
The balls roll down an inclined plane. vector graphicsThe balls roll down an inclined plane. Vector graphics