How To Use Round-backed In A Sentence

• The crawfish has a tail, and five fins on it; and the round-backed carid has a tail and four fins; the squilla also has fins at the tail on either side. The History of Animals
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• One is strumming a fat, round-backed guitar known as a vihuela, another, the deep-sounding guitarron, while two young singers gamely try to be heard: "De colores, de colores, se visten los campos en la primavera. Durangoherald.com
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• Further along, one could see where the street passed over a round-backed bridge and on into more rural surroundings.
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