During the Petrochemical PTA plant upgrade, the production capacity was expanded from 225 Kt/a to 400 Kt/a while achieving a 32% reduction in overall energy consumption.
这句话应该没有语法错误,但是这个while achieving的逻辑主语是哪个呢?
赞同好题老师分析观点!
During the Petrochemical PTA plant upgrade, the production capacity was expanded from 225 Kt/a to 400 Kt/a while(it is省略) achieving a 32% reduction in overall energy consumption.
备注:现在分词 achieving 逻辑主语为 it,而且 it 指代介词 during 宾语,即 the Petrochemical PTA plant upgrade。
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