Thus, relative to plant foods, meat is a highly nutritional food resource.
句中relative to plant foods是什么成分？
《韦氏》relative to ：formal
1—used to describe what someone or something is like when compared with or measured against someone or something else
Dolphins have large brainsrelative totheir body size.
The value of the house is lowrelative tosimilar houses in the area.
网友的句子中，relative to = compared with
Thus, relative to plant foods, meat is a highly nutritional food resource.
= Thus,compared withplant foods, meat is a highly nutritional food resource.
所以，relative to plant foods 为句子状语（修饰句子，表示句子内容成立的条件）。
