黄河三角洲的变迁(1989-2009)
1989http://earthobservatory.nasa.gov/Features/WorldOfChange/images/yellow_river/yellow_river_19890213.jpg
1995
http://earthobservatory.nasa.gov/Features/WorldOfChange/images/yellow_river/yellow_river_19950918.jpg
1999
http://earthobservatory.nasa.gov/Features/WorldOfChange/images/yellow_river/yellow_river_19991007.jpg
2004
http://earthobservatory.nasa.gov/Features/WorldOfChange/images/yellow_river/yellow_river_20040910.jpg
2009
http://earthobservatory.nasa.gov/Features/WorldOfChange/images/yellow_river/yellow_river_20090620.jpg
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