In addition to having more protein -than wheat does, the protein in rice is higher quality than that in wheat, with more of the amino acids essential to the human diet.
至于你问的:
Rice has protein of higher quality than wheat does.(主语比较,Rice 与wheat比)
意义:米有高质蛋白质,麦没有。 为什么他要这么翻译主语之间的比较
Rice has protein of higher quality than that in wheat(宾语比较,protein 与protein(that指代)比
意义:米中的蛋白质比麦中蛋白质质量高
Rice has protein of higher quality than sugar.(宾语比较,protein 与sugar比)
意义:米中的高质蛋白质比糖多。
我觉得是这个意思:
Rice has protein of higher quality than wheat does.(主语比较,Rice 与wheat比)
意思:跟麦比,米有更质量的蛋白质(米的蛋白质质量一定高于麦的,麦可能有质量差一点儿的蛋白质也可能根本就没有。其实是废话嘛,跟“没有”蛋白质的麦比,只要有蛋白质,那米的一定“更好”)
Rice has protein of higher quality than that in wheat(宾语比较,protein 与protein(that指代)比
意义:米中的蛋白质比麦中蛋白质质量高 (因为已经说了that in wheat,也就是说麦中一定有蛋白质,只能是米中的蛋白质比麦中蛋白质质量高)
Rice has protein of higher quality than sugur.(宾语比较,protein 与sugar比)
意义:米中的高质蛋白质比糖多。(容易理解,没啥好说的)