本文分析优惠性原产地规则的保护机制及其效应，指出WTO统一优惠性原产地规则的必要性。
This paper makes an analysis of the protection mechanism and the effect of the pro, stating that it is vital that the WTO make unified pro.
DNA分析表明，淋巴瘤患者的原产地。
DNA analysis showed that the lymphoma was of patient origin.
从景德镇陶瓷的现状出发，分析阐述了原产地保护对景德镇陶瓷的必要性。
The author introduce the present situation of Jingdezhen ceramics first, then analysis the necessity that Jingdezhen ceramics will be protected according to the principle of country of origin.
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