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Persian leopard (Panthera pardus ciscaucasica), also called Caucasian leopard
Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called
Detonation is a secondary ignition of the air–fuel mixture. It is also called spark knock or ...
A square matrix P is called a permutation matrix if each row and column of P contains exactly ...
A thin cleft, called the synapse, separates one cell from another.