1、Throughout a horse's lifetime, its teeth wear naturally from eating roughage and processed feeds.
在馬的一生中，牙齒在咀嚼粗飼料和精加工飼料的過程中被自然磨損。

2、Eat more roughage to keep healthy.
多吃些粗糧保持健康。

3、Some cats enjoy chomping on plants every once in a while to get roughage or fiber.
還有一些貓喜歡偶爾嚼嚼植物來攝取纖維素。

roughage翻譯