To trace the source of meat, or even leather goods, scientists can use DNA barcoding, which uses a short genetic marker from the sample to identify it.
科学家可以使用基因条形码技术（通过来自样本的短基因标记来识别物种的技术），可以追朔肉甚至是皮革商品源于什么物种。
Short of good empirical meat, they have to rely on elaborate theory and guesswork to fill in what they cannot observe.
缺少好的观察实验的素材，他们不得不依赖复杂的理论和凭空猜测来替代他们所不能观察到的。
Chilled and frozen meat products require an uninterrupted cold chain during storage, transportation and display and have a short shelf life.
冷藏肉制品和冷冻肉制品在储藏、运输和陈放期间要求冷链不间断，而货架寿命并不长。
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