净: clean第一性: primary气体: gas; gaseous fluid生产: produce; manufacture净长一性气体生产: net primary aerial production净第一性生产: net primary production气体生产: gas production气体生产厂: gas generation plant气体生产技术: gas production technology净第一级生产量；净初级生产量: net primary production; netprimaryproduction气体生产机；气体发生器: gas generator第一性: [哲学] primary 物质是第一性的。 matter is primary第一性特征: primary(secon sex characters第一性饮水: primary drinking第一性征: primary sex character s; primary sex characteristics; primary sex characters; primary sexual characteristics第一性症: primary sexual character第一性徵: sex organ气体生成: gassing个体生产者: individual producer集体生产: collective production菌体生产: microbic biomass production离体生产: multi-layer production团体生产性: grouproductivity整体生产树: block tree保护性气体: protective gas
