Sentence examples for are a keystone from inspiring English sources

Bees are a keystone species".

"They are a keystone species".

In a healthy marine ecosystem, oysters are a keystone species.

Oysters, he said, are a keystone species in the bay.

Human rights are a keystone of global stability and security.

Oysters are a keystone species which means they have a disproportionate positive effect on their ecosystem.

Miniaturization is a keystone.

Non-violence is a keystone of Vinoba's philosophy.

This bargain is a keystone of the U.S. federal system.

The Neurology Residency Program is a keystone of the Yale University Department of Neurology.

Subtlety must be a keystone to our policy.