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1: Bird abatement 2: Soil 3: Community 4: Range 5: Weed 6: Periplaneta americana 7: Alaska 8: Maximum mid-expiratory flow rate 9: Lead 10: Feeder 11: Japan 12: Process 13: Change 14: Contamination 15: Electricity 16: Function 17: Fishery 18: Development 19: Atmosphere 20: Environment (As of 13:00)