“roughage”造句，怎麼用roughage造句

In experiment 3, the roughage intake ad libitum by sheep was negativelycorrelated with concentrate levels in diet (r~0.95 1).

Some cats enjoy chomping on plants every once in a while to get roughage or fiber.

Some cats munch on grass or other plants, but most biologists agree that such roughage serves only as a digestive aid and provides limited if any nutritional value.