How to use in-sentence of “dark spot”:
+ Several discoveries were made, including the discovery of the Great Dark Spot and Triton’s geysers.
+ However, pictures taken by the Hubble Space Telescope showed that the Great Dark Spot had disappeared.
+ Seen under a microscope, the nucleolus is a dark spot inside the cell’s nucleus.
+ It is not known why the dark spot disappeared.
+ The reason why the Great Dark Spot has disappeared is unknown.
+ Instead, a new storm similar to the Great Dark Spot was found in the planet’s northern hemisphere.
+ The Great Dark Spot is thought to be a hole in the methane cloud deck of Neptune.
+ They have stripes running from their noses to their eyes and a dark spot behind each eye.

