n.反刍的食物
It did infect all cud-chewing animals, but many of them showed no symptoms. 它的确感染所有反刍动物，但很多动物被感染后没有症状。
I chewed the cud for a couple of days before deciding to refuse your offer. 我反复思考了二三天后才决定拒绝你的提议。
