id	keyword
esrj-68391	pollen
esrj-68391	lake
esrj-68391	gaoyou
esrj-68391	size
esrj-68391	china
esrj-68391	river
esrj-68391	gaoyou lake
esrj-68391	et al
esrj-68391	changes
esrj-68391	grain
esrj-68391	climate
esrj-68391	core
esrj-68391	gy08
esrj-68391	sediment
esrj-68391	water