marsh-gas n.沼气；甲烷marsh-buggy [地球科学]沼泽车marsh trefoil marsh road marsh plants marsh plant marsh ore [矿物] 沼铁矿marsh marigold marsh mallow root 药用蜀葵根marsh mallow chocolate [经济学]椰丝弹性巧克力marsh mallow 药用蜀葵；草芙蓉marsh land economy [经济学]洼地经济marsh land 沼泽地marsh horsetail marsh hen marsh hawk marsh harrier marsh gas power generation 沼气发电marsh gas 甲烷，[能源] 沼气marsh elder