Especially with every level having its own unique lines. (lifeisxbox.eu)
Billy and Jimmy get unique lines of dialogue in multiplayer, and I couldn't help but laugh when one brother exclaimed, «Hurry up, butt weasel!» (co-optimus.com)
At the beginning of their lives as hydrogen - burning objects, stars define a nearly unique line in the Hertzsprung - Russell diagram called the zero - age main sequence. (britannica.com)