首先这不是一道SC题,而是CR83题的一种语法结构,本人看了实在有点困惑,求高手指点。
1. A选项:(A) These winemakers have been able to duplicate the preservative effect produced by adding sulfites by means that do not involve adding any potentially allergenic substances to their wine.
红色字部分修饰的是谁?能理解为指代前面的整句么?如果是这样这是应该用哪种语法现象解释?或者by means 有特殊用法?实在困惑,多谢!
by means of/ that...... 修饰动作或者动作性名词。
1)先看the preservative effect produced by adding sulfites,produced by adding sulfites = be produced by adding sulfites,这里的by是被动时态的by
2)adding sulfites by means that do not involve adding any potentially allergenic substances to their wine,这里的by means of/ that是固定搭配,修饰add这个动作。
加亚硫酸盐的作用是防腐,而不是加入其他可能致敏的成分,即只需加入亚硝酸盐这一种就可以实现preservative的效果而且不会致敏。