A new solid phase extraction-gas chromatography-mass spectrometry(SPE-GC/MS) method for simultaneous determination of ractopamine and clenbuterol in animal urine was reported.

建立了固相萃取-气相色谱-质谱法（SPE-GC/MS）同时测定动物尿样中的莱克多巴胺和克伦特罗的方法。

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Exhausted and terrified, the animal shakes uncontrollably, leaving trails of urine as she is dragged off the truck and hurled into a cage on the ground.

这只动物由于疲惫和恐惧控制不住地颤抖着，当她被拖离卡车猛地塞进地上的一个笼子时她一路留下了尿渍。

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Two years later they're found living off tree bark, wearing animal skins and making nutritional smoothies out of locally gathered herbs and their own urine.

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