Consumption Protein Increases Blood Concentration Amino Acids Proportionately

意群训练： The consumption of protein increases blood concentration of the other amino acids much more ，proportionately ，than it does that of tryptophan .

标志： The consumption (of protein) increases blood concentration (of the other amino acids) /much more , proportionately , than it does that of tryptophan/.

译文： （蛋白质的）消耗 增加 了（其他氨基酸在）血液中的浓度 的程度 在比例上/ 远远高于 蛋白质的消耗增加 tryptophan在血液中的浓度的程度 /。

解释： 主语的consumption不是普通的消费、消耗，而是特指人体对于食物的摄取。

本句从much more开始变得不好懂。首先是插入语proportionately，然后是一连串的以省略为目的的看不清楚的指代：than it does that of tryptophan。其实than 之后的内容如果找到与前面的对应，应该是it指the consumption of protein ，does指increases，that指blood concentration。如果把这后半部分补全就是than the consumption of protein increases blood concentration (of tryptophan）。