Adopt arch crest as air supply system, arrangement vents symmetry, and select 5 kinds of vents to arrange the project, according to the experiment request and factory premises construction form.

根据试验要求和厂房结构形式，本论文的模型试验在发电机层采用拱顶送风系统，风口对称均匀布置，选取5种风口布置方案。

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As well as taking a supply of masks, team Canada will bring air purifiers, asthma puffers, eye drops, nasal sprays and throat lozenges to help with the side effects of poor air.

除了提供口罩，加拿大队还将携带空气净化器、哮喘喷雾剂、眼药水、鼻喷剂和咽喉含片来减轻恶劣空气的副作用。

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As long as there is a steady supply of rising air, cloud droplets are buoyed up and can't fall.

只要有持续供应的上升气流，云朵中的小水滴就会漂浮着而不会降落。

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As part of the supply effort, the British Royal Air Force even landed Sunderland Flying Boats on a Berlin lake.

VOA: special.2011.08.11

Not surprisingly, the countries are wealthy and among the world's greenest as well, according to the Environmental Performance Index, a joint product of Columbia University and Yale University, which measures performance against 25 indicators, such as measures of air pollution, water supply or use of natural resources.

FORBES: The Most Energy-Efficient Countries