How to use in-sentence of “keystone”:
+ Some other examples of keystone species are the ottersea otter, wolves.
+ Bison are a keystone species.
+ The Keystone Kops were fictional policemen.
+ She was a popular star and collaborator of Mack Sennett in his Keystone Studios.
+ The Western Hockey League announced on October 16, 2008, that the Wheat Kings were chosen to host the 2010 Memorial Cup championship at the Keystone Centre.
+ I-80 becomes the Keystone Shortway The eastern end of I-80 is its junction with the New Jersey Turnpike and Interstate 95 just west of the George Washington Bridge entering New York City.
+ There was also a dispute over whether funding should be funded towards building a Mexico–United States border wall, a keystone policy during Donald Trump’s presidential campaign.
