一个英语句子的小疑问,答完了加分,a recent study shows that meat consumption is one of the main ways that human can d

题目

一个英语句子的小疑问,答完了加分,a recent study shows that meat consumption is one of the main ways that human can damage the environment,second only to the use of motor vehicles.这里面后半句second only to the use of motor vehicles是定语从句吧?是属于什么情况的定语从句呢?

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