蒂姆·拉夫说：“吃素食看起来是更健康的选择(而且可能常常是这样)，不过话又说回来，适度的肉可以为我们提供必需的蛋白质、铁和氨基酸。”
Tim Love says: "Eating vegetarian may seem like the healthier option (and, probably, often is), but when it comes down to it, meat, in moderation, provides much needed protein, iron and amino acids."
我们追踪了一种氨基酸(形成蛋白质的必需品)，这样我们就能发现腿部肌肉中流失了多少蛋白质。
We tagged one of the amino acids (from which proteins are made) so that we could discover how much protein in leg muscle was being broken down.
一个基因由一系列指令组成，这些指令是生成一个单一的蛋白质所必需的。
A gene comprises the set of instructions needed to make a single protein.
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