Such outfits now exist for various rivers, including the Danube, the Niger, the Okavango, the Red, the Sava and so on.
这种组织目前存在于各种河域，包括多瑙河、尼日尔、奥卡万戈三角洲、红河、萨瓦河等。
Such outfits now exist for various rivers, including the Danube, the Niger, the Okavango, the Red, the Sava and so on.
这种组织目前存在于各种河域，包括多瑙河、尼日尔、奥卡万戈三角洲、红河、萨瓦河等。
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