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- The negative air ion concentration in different communities were as follows: lower greenbelt>woodland>weed land>bald land>concrete piazza. 不同植被类型由高到低依次为：花卉绿地＞林地＞宜林荒草地＞裸露地＞水泥广场；
- Fixing and Negative Air Ion Effect on Silk by Sol-Gel Process 溶胶凝胶法对真丝绸的固色及负离子效应
- Methodological Study on Measurement of Negative Air Ion 空气负离子剂量测量方法的探讨
- Spatio-temporal changes of negative air ion concentrations in Beijing 北京地区空气负离子浓度时空变化特征的研究
- Study on the Contribution of Winter-season Crops to Negative Air Ion 冬季田间农作物对环境空气负离子浓度影响的研究
- electrically generated negative air ions (ENIs) 空气负离子
- Assessment of air cleanness degree in Beijing using negative air ion concentration as an index 用空气负离子浓度对北京地区空气清洁度进行初步评价
- Keywords Negative Air Ion;Inspirable Particle Concentration;Indoor Air Quality Monitoring; 空气负离子浓度;可吸入颗粒物浓度;室内空气质量监测;
- negative air ion 空气负离子
- negative air ion content 负离子浓度
- Negative air ion concentration 空气负离子浓度
- Keywords electrically generated negative air ions（ENIs）;Caenorhabditis elegans;development;lifespan;brood size; 空气负离子;秀丽隐杆线虫;发育;寿命;繁殖性能;
- negative air ions concentration 空气负离子浓度
- negative air ions 空气负离子
- A negative air flow environment with HEPA filtration is recommended in confined attics and crawl spaces to ensure the operator’s safety. 由于我们产品的选择范围广泛，我们能够为您的应用和预算推荐最佳配置，而不会牺牲质量。
- The machining envelope is kept under negative air pressure, with chips and oil mist pulled out in an airstream, then through a centrifuge and filter system. 机器密封环境是出于负起呀下，碎片和永无用气流抽出，随后离心过滤。
- The air in the garden was warm and fragrant. 花园里的空气一片温馨。
- The archers sent their shafts through the air. 弓箭手向空中射出利箭。
- Let's purify air with a negative ion generator. 我们用负离子发生器净化一下空气吧。
- The lack of air in the room make everyone sniffle. 屋子里空气缺乏，使得每个人都频频吸气。
