The technology of stable C, N isotope ratio is an effective method for geographical origin traceability of beef.
利用稳定性碳、氮同位素技术是用于牛肉产地溯源的有效方法。
The geographical origin traceability of food, an important part of traceability system, is effective in protecting the quality and safety of foodstuffs.
食品产地溯源是建立食品质量安全追溯制度的重要组成部分，也是保障食品质量安全的有效手段。
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