braying a fretful counterpoint to the steady thud of an irrigation pump 这是现在分词短语作伴随状语,修饰谓语动词waited。braying 在此为及物用法,后接宾语,意为发出....的叫声。
At the edge of a nearby canal, donkeys laden with freshly harvested alfalfa waited for their masters to lead them home, braying a fretful counterpoint to the steady thud of an irrigation pump.
请问 braying 和a fretful counterpoint to the steady thud of an irrigation pump是什么关系呢?a fretful counterpoint to the steady thud of an irrigation pump是braying的同位语吗?