外源稀土是入动物体内的途径、分布、代射及毒性郭战勇（世钢稀土企业集团包头０１４０１０）张宇生张宏江（包钢稀土研究院包头０１４０１０）稀土元素及其化合物具有特殊的性能和广泛的用途，多年来，随着稀土在动物和医学方面的应用日益深入，人们对稀土元素的生物效应... Exogenous Rare Earths Are Approaches, Distribution, Substitution and Toxicity into Animals GUO Zhan-Yong (World Steel Rare Earth Enterprise Group Baotou 014010) Zhang Yusheng Zhang Hongjiang (Baotou Rare Earth Research Institute Baotou 014010) Rare earth elements and their compounds have special properties and are widely used Uses, over the years, with the application of rare earth in animals and medicine has become increasingly in-depth, people on the biological effects of rare earth elements ...