您要查找的是不是：
- Air electronic filter 电子空气净化网
- The electronic filter attenuates the resonance frequency of the accelerometer to prevent overloading of the DA equipment. 电子滤波器可以减少加速表的谐振频率，防止DA设备过载。
- Active filter design software for lowpass, highpass, bandpass and bandstop electronic filters using resistors, capacitors and op amps. 有源滤波器设计软件的低通，高通，带通和带电子过滤器使用电阻，电容和运算放大器。Provides Butterworth; Chebyshev; Elliptic and Bessel Approximations to order 20; with a variety of circuit choices.;提供巴特沃思，切比雪夫，椭圆和贝塞尔逼近常规第20条，与不同的电路选择。
- A filter traps dust from the air. 过滤网可存住空气中的尘埃。
- 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。
- Non-commissioned aircrew fulfil roles such as Air Loadmasters (ALM), Air Signallers, Air Electronics Operators (AEO), etc, although they are now all known as Weapon Systems Operators. 所有飞行员并且武器系统官员(以前以著名导航员)在皇家空军是被委任的官员。
- 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。
- During the intermission, let's go out for some fresh air. 幕间休息时，我们出去呼吸呼吸新鲜空气吧。
- The air held a foretaste of a storm. 天气有要括大风的迹象。
- The air was reeking with the smell of tobacco. 空气中弥漫着烟草的气味。
- A walk in the fresh air will pep me up. 我在空气新鲜的地方散步就感到精神饱满。
- He served one month with the Air Army in Kuwait. 他在科威特的空军里服役1个月。
- Large air and navel forces were set into action. 庞大的空军和海军部队开始行动了。
- His modesty [air of joviality] was all put on. 他的谦逊[愉快的样子]都是装出来的。
- Ida was choking with the dry air. 空气干燥，艾达感到喘不过气来。
- His vibrant voice commove the air. 他响亮的声音振动了空气。
- Fresh air and exercise are good for the health. 新鲜空气和运动有益于健康。
- I shall travel to New York by air this weekend. 这个周末我将要乘飞机去纽约旅行。
