Five-year-old had been playing by river in mangrove swamp at time of his disappearance.
他消失时5岁，正在红树林沼泽地里一条河边玩耍。
The erosion of riverbank and the disappearance of riparian buffering strips are among the concerns in river ecosystem.
河道生态系统中的河岸侵蚀和滨水缓冲带建设备受关注。
The erosion of riverbank and the disappearance of riparian buffering strips are among the concerns in river ecosystem.
河道生态系统中的河岸侵蚀和滨水缓冲带建设备受关注。
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