This month, writer Charles Siebert and photographer Michael Nichols explore Daphne 's orphan elephant rehabilitation center, the Nairobi nursery of the David Sheldrick Wildlife Trust.
作家查尔斯。西伯特和摄影师麦克。尼克尔斯本月探索达芙妮的小象孤儿康复中心——大卫。歇尔德瑞克野生动物基金会的内罗比托儿所。
Methods: The historical background formed American Orphan Drug system, regulation of Orphan Drug system, preferential measure, and FDA s approval procedure are stated.
方法：根据个人掌握的资料，说明美国罕见病药物制度形成的背景、有关法规、优惠措施及FDA审批程序。
Methods: The historical background formed American Orphan Drug system, regulation of Orphan Drug system, preferential measure, and FDA s approval procedure are stated.
方法：根据个人掌握的资料，说明美国罕见病药物制度形成的背景、有关法规、优惠措施及FDA审批程序。
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