implicated在此为过去分词作定语,表示被动意义,修饰tiny carbon particles ,即逻辑上tiny carbon particles是implicate的宾语。后面的in 介词短语是implicated的状语。注意这种用法:
He is implicated in the scheme to defraud the government.
He was deeply implicated in the plot.
他与该阴谋牵涉颇深。
already implicated in heart disease, cancer and respiratory ailments
= which are already implicated in heart disease, cancer and respiratory ailments
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