which引导的定语从句的位置中国日报的一句话:On this day, measures to improve motor efficiency come into force in the region, which are expected to save 135 terawatt hours of electricity per year as of 2020. 此处的which are expect

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which引导的定语从句的位置中国日报的一句话:On this day, measures to improve motor efficiency come into force in the region, which are expected to save 135 terawatt hours of electricity per year as of 2020. 此处的which are expect
which引导的定语从句的位置
中国日报的一句话:On this day, measures to improve motor efficiency come into force in the region, which are expected to save 135 terawatt hours of electricity per year as of 2020.
此处的which are expected to save 135 terawatt hours of electricity per year as of 2020很明显是修饰measures的,但是位置为什么在后面了呢?
望高手解答

which引导的定语从句的位置中国日报的一句话:On this day, measures to improve motor efficiency come into force in the region, which are expected to save 135 terawatt hours of electricity per year as of 2020. 此处的which are expect
如果把定语从句一定要放到它修饰的词的后面,这个句子会产生“头重脚轻”的感觉,所以使用了分隔性定语从句的形式,也就是从句不和它修饰的先行词在一起.
在倒装的定语从句中,也常常使用这个形式.

这是一个非限制性定语从句。在非限制性定语从句中,定语从句与先行词关系不密切,可用逗号将其与主句隔开。