当动物吸收的铜高于它们的正常需求,达到175毫克/千克饲料,甚至达到250毫克/千克饲料时,铜能够对小猪的生长和喂养产生影响,使小猪断奶后长至大约25千克重（8至10周）.
英语翻译When used at levels higher than those covering animal re
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