The FEM equation of acoustic wave is used to calculate the air-current natural frequency and pressure pulsation in the pipeline.
利用有限元法求解声学波动方程，建立了管内气流的有限元运动方程，计算出管内气柱的固有频率和气流压力脉动。
The ability to distinguish between current and structural issues has helped turn around Air France's business since the 1980s and 1990s.
区别当前性问题和结构性问题的能力，帮助法航在上世纪80和90年代扭转了业务格局。
Admittedly, there are various factors contributing to the current worldwide air pollution, but it is undeniable that the exhaust from automobiles is categorized as one of the major elements.
诚然，有很多因素导致了现在的全球空气污染问题，但是不能否认的是汽车废气被归为最重要的因素之一。
A current arcs between them and turns the surrounding air into a plasma by stripping electrons from their parent atoms.
一道电流在两个电极之间划过，带走空气里父原子中的电子，从而使周遭空气变成等离子体。
Rich countries account for most of the past emissions that now fill the air, but less than half the world's current emissions.
大气中累积的绝大部分温室气体由发达国家排放，但发达国家目前的排放量还不到世界总量的一半。
The subsidiary door, matching with the common door plate, can not only barricade the sight of outsiders but guarantee air current through the door.
这种辅助房门配合普通房门使用，不仅能遮挡房外人的视线，而且能保证房内外空气流通。
With no air flow, current should be low.
如果没有空气流动，电流应该比较低。
Room air current velocities in the vicinity of fume hoods should be as low as possible, ideally less than 30 percent of the face velocity of the fume hood.
通风柜附近的扰流流速应尽可能低，理想的流速应低于通风柜设计面风速的30%。
Wind is a current of air caused by a vacuum caused by hot air rising.
风是由热空气上升产生真空而引起的空气流动。
Space Fence will replace the current VHF Air Force Space Surveillance System built in 1961.
太空护栏将取代目前建于1961年的甚高频空军空间监测系统。
The current Air Force One, with its white and blue design recognizable around the globe, is aging.
当前服役的这架蓝白相间的空军一号是全世界都很熟悉的，但飞机正在老化。
Based on the boundary condition of jet flow in a niche and the interaction of jet with air current, a pressurization relation equation have been established.
本文根据壁龛射流的边界条件，进行射流与通风气流之间运动和力的作用关系分析，建立了壁龛射流的增压关系式。
When confronted momentarily with an ascending air current, the paraglider climbs since the Angle of attack has increased.
当我们遇到暂时性上升空气时，飞行伞会随著攻角增加而上升。
The chip could also use thermoelectric materials, which produce an electric current when exposed to two different temperatures-such as body heat and the (usually) cooler air around us.
芯片也可以使用温差热电材料- - -这种材料因环境中两种不同温度而产生电流- - -例如身体温度和(通常是)我们周围的更凉的空气。
It takes into account current temperature, current humidity, and current season of the year in determining the heating or air conditioning setting for the area being monitored.
它考虑当前温度、当前湿度和当前季节，以便为所监视的区域确定供热或空调设置。
Cold air and a warm and wet air current will affect most regions in Central and East China starting January 19, bringing rain or snow, the National Meteorological Center forecast.
据中央气象台预报，19日起，受冷空气和暖湿气流的共同影响，我国中东部大部地区将出现较大范围雨雪天气。
It can be widely used in the air quality monitoring, automatic ventilating system, air purifying machine, and air current controlling equipment.
TGS2600可广泛用于空气质量监测、自动通风换气系统、空气清新机和气流控制设备中。
NextGen is the FAA's long-term plan to replace the current radar-based air-traffic-control system with one that operates using satellites and a global positioning system.
联邦航空管理局的长期规划是用凭借卫星和全球定位系统的次世代体系替换现有的依靠雷达的空中交管系统。
The best news: Existing owners of the current Kindle model will get both of these enhancements via an over-the-air software update.
最好的消息：Kindle目前机型的现在拥有者通过无线软件升级，将获得这两项性能的提升。
Efficient ventilation and sound air current are significant to improve indoor air quality, control the contamination concentration, and ensure the realization of healthy and comfort air-condition.
有效地通风和合理的气流组织对于改善室内空气品质，控制室内污染物浓度，保证实现健康建筑、健康舒适性空调有着重要的意义。
A goose's wings churn the air and leave an air current behind.
一只大雁的翅膀扇动空气，在身后留下一股气流。
I felt a current of cool air blowing in my face.
我感到一股凉气吹在脸上。
You can freely control the direction of air current.
能够自由改变气流方向。
The current five-year plan, which contains few other numerical targets, envisages a 10% reduction in concentrations of the worst air pollutants and a 20% increase in energy efficiency over the period.
现行的五年计划，其包括的数字目标没有几个，设想这期间最差的空气污染物的浓度减少10％，能源效率增长20％。
Wind system and air current organize and design.
风系统及气流组织设计。
The monthly averaged basic air current was approximately the barotropic instable condition which was measured by the meridional gradient of absolute vorticity.
对于这个月月平均基本气流，进行正压不稳定度判据的检定，发现存在接近正压不稳定的条件。
Vocal music is a process of modulating air current to utter the sound.
声乐是科学地运用气息进行发声的过程。
Vocal music is a process of modulating air current to utter the sound.
声乐是科学地运用气息进行发声的过程。
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