id	keyword
esrj-94076	xisha islands
esrj-94076	water
esrj-94076	landforms
esrj-94076	fractal
esrj-94076	water area
esrj-94076	characteristics
esrj-94076	dimension
esrj-94076	projection
esrj-94076	method
esrj-94076	shidao water
esrj-94076	surface
esrj-94076	research
esrj-94076	scale
esrj-94076	las