语法结构分析

Many of the reductions over the past 30 years have been achieved either by reducing the amount of sugar, salt or fat in a product, or by finding an alternative ingredient.

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最佳答案 2020-11-25 14:34

Many of the reductions （主语）over the past 30 years （主语的定语）have been achieved （谓语动词）either by reducing the amount of sugar, salt or fat in a product, or by finding an alternative ingredient.（方式状语，由连词 either... or ...并列）

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刘永科 - 教育出版集团英语总顾问 & 英语系列图书主编

擅长：语法理论,语言学,文化背景 | 采纳率 86% | 回答于 2020-11-25 12:09

语法结构分析

最佳答案 2020-11-25 14:34

Many of the reductions （主语）over the past 30 years （主语的定语）have been achieved （谓语动词）either by reducing the amount of sugar, salt or fat in a product, or by finding an alternative ingredient.（方式状语，由连词 either... or ...并列）

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