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land improvement
earth.sc. 土地改良【土】
econ. 土地改良投资
hydroel.st. 土地改良
IMF. 土地开垦; 农垦
tech. 土壤改良
land improvement
: 27 phrases in 9 subjects
Agriculture7
Animal husbandry1
China2
Earth sciences5
Economy6
General1
Hydroelectric power stations2
Soil science1
Technology2