英汉例句雙語例句National heritage corridors of USA are studied from an example as blackstone river valley heritage corridor and actions how American people to do with corridors are summarized.通過對黑石河峽穀遺産廊道來研究美國國家遺産廊道，縂結美國對於這種新型遺産保護的做法。blackstone river更多例句词组短语短語Blackstone River Valley 黑石河峽穀blackstone river更多词组