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1: Bird abatement 2: Soil 3: Alaska 4: Range 5: Maximum mid-expiratory flow rate 6: Community 7: Weed 8: Periplaneta americana 9: Feeder 10: Contamination 11: Japan 12: Change 13: Lead 14: Function 15: Process 16: Human 17: Fishery 18: Environment 19: Electricity 20: Atmosphere (As of 17:49)
