从二十世纪六十年代起，护河者这样的组织，以及民谣歌手皮特•西格这样的倡导者，一直竭力恢复哈德逊河的生态系统。
Since the 1960s, groups like Riverkeeper and advocates such as Pete Seeger, a folk singer, have fought to restore the river’s ecosystem.
从二十世纪六十年代起，护河者这样的组织，以及民谣歌手皮特·西格这样的倡导者，一直竭力恢复哈德逊河的生态系统。
Since the 1960s, groups like Riverkeeper and advocates such as Pete Seeger, a folk singer, have fought to restore the river's ecosystem.
从二十世纪六十年代起，护河者这样的组织，以及民谣歌手皮特·西格这样的倡导者，一直竭力恢复哈德逊河的生态系统。
Since the 1960s, groups like Riverkeeper and advocates such as Pete Seeger, a folk singer, have fought to restore the river's ecosystem.
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