air barrier

基本解释

Inflatable packaging uses air pressure to secure and hold products in place inside the shipping container and provides an air barrier of cushioning.
充气包装利用气压来牢固及维持货件于托运容器内的位置，并提供一个气垫。
Theseresults suggested that the concentration curve was determined mainly by the THOtransport across blood-air barrier in the primary pulmonary circulation.
结果说明呼出气氚水浓度曲线是氚水经肺首次循环时透过血-气屏障的转移所产生。
Arithmetic mean thickness and harmonic mean thickness of blood-air barrier thickened with age increasing, and there were remarkable difference between neighboring two groups(P0.05).
黄牛的气-血屏障的算术平均厚度和调和平均厚度均随年龄增加而不断增厚，且相邻两个组之间差异显著（P〈0.05）。

And in 2007 a survey of around 200 space companies by the Air Force Research Laboratory cited export controls as the highest barrier to foreign markets.
ECONOMIST: Space technology
In addition, EPA's and USDA's relevant authorities cover a range of natural resources and their supporting ecosystems, including waters, sediments, barrier islands, wetlands, soils, land management, air resources, and drinking water supplies.
WHITEHOUSE: Executive Order -- Gulf Coast Ecosystem Restoration
Preventing this process using an iron-free, corrosion-resistant alloy barrier is particularly important in a city like Boston, where the air is damp and laden with salt water.
ENGADGET: Engineering a better bicycle with DBC City Bike Design Alt