This week Wal-Mart is set to announce a major initiative aimed at helping cotton farmers go organic: it will buy transitional (过渡型的) cotton at higher prices, thus helping to expand the supply of a key sustainable material. (09.6 Passage 1)
分析主干：Wal-Mart is set to announce a (major) initiative: it will buy (transitional)cotton...
1.本句冒号后的内容是对前文initiative 的详细阐述，相当于一个同位语从句。
2.冒号前的分句中，谓语动词用了be set to do 结构，过去分词短语aimed to...是initiatives 的后置定语，相当于一个定语从句。
3.冒号后的分句中，结构简单，其中helping to...是现在分词短语，作谓语动词buy 的状语，表示目的。
译文：本周沃尔玛超市准备出台一项重大举措，目的在于帮助棉农种植有机棉：沃尔玛将以更高的价格收购过渡型的棉花，以此帮助扩大一种重要有机原材料的供应。
[b]
发表于 2016-7-11 18:45:04