单语范例（未经PONS编辑处理）
Calves are weaned at one year and become independent shortly thereafter.
en.wikipedia.org The compound is highly toxic to monogastrics and even sometimes to calves which are really pre-ruminants in terms of their developing digestive system.
en.wikipedia.org Calves weigh about 19kg lb at birth, and can usually stand on their own within a few minutes of birth.
en.wikipedia.org She has already given birth to several calves, although none of them are pure white.
en.wikipedia.org They also will charge young calves separated from their parents.
en.wikipedia.org