As feathers became larger over time, flapping flight evolved and birds finally became fully air-borne.
随着时间的推移，羽毛变得越来越大，扑翼飞行逐渐发展，鸟类最终完全可以在空中飞行。
They may also spread via air-borne droplets from a cough or sneeze.
病毒和细菌也可通过咳嗽或喷嚏在空气中产生的飞沫传播。
Dirty air or air-borne garbage causes stinging eyes and running nose.
肮脏的空气或空气传播的垃圾引起眼睛刺痛和流鼻涕。
In the end, several problems related to the mountainous area air-borne SAR image processing are discussed.
在文章的最后对山区雷达影像处理中的几个问题进行探讨。
And experiment indicates that this method has a high precision in rectifying the air-borne SAR images of mountainous areas.
试验表明：此方法在纠正高山地区影像时具有较高的精度。
The performance test and fault diagnosis for air-borne equipments is an important facet of airplane maintenance in ground service.
机载设备的性能检测与故障诊断是飞机地勤维护中的一个重要方面。
The performance test and fault diagnosis for air-borne equipments is an important facet of airplane maintenance in ground service.
机载设备+的性能检测与故障诊断是飞机地勤维护中的一个重要方面。
This paper studies image algorithms and analyses imaging quality of air-borne Synthetic Aperture Radar (SAR) in large squint mode.
文章研究了机载合成孔径雷达(SAR)在大斜视角下的成像算法，并分析了算法的成像性能。
In a Y7 test airplane, the cabin noise is analogized by an exciter to structure-borne noise and by a loudspeaker to air-borne noise.
在一架运七试验机上，激振器和扬声器分别被用来模拟由螺桨旋转在舱内引起的结构和气动噪声。
At last, combining FSA and IROPE algorithms, using air-borne SAR actual flight data, the algorithms' feasibility and validity are validated.
最后，结合FSA成像算法和IROPE自聚焦算法，以机载SAR实际飞行数据为基础，对算法的可行性和有效性进行验证。
The need of equipments'fault test and fault diagnosis is more and more urgent since the advanced air-borne equipments began to arm airplanes.
随着先进的机载电子设备的不断装备飞机，设备的故障检测和故障诊断的要求也日益迫切。
Objective Explored the relationship between weight index and metabolize synthetic on the employees (20 to 59 years old) in China Air-borne Missile Academy.
目的了解中国空空导弹研究院20 ~59岁职工体重指数与代谢综合征(MS)及其组分之间的关系。
To improve the detective ability of air-borne and ground laser lidar systems, the expressions of isoplanatic angles of single-and dual-conjugate systems were deduced.
为提高机载和地面激光雷达的探测能力，导出了单、双层共轭系统等晕角计算公式。
Airborne sound insulation is separation capability of air-borne sound, and the performance of airborne sound insulation between rooms is an important criterion of privacy.
空气声隔声是对空气传播声音的隔绝，房间之间空气声隔绝的性能是评价室内环境私密性的重要指标。
There are many kinds of air-borne equipments and the signals to be measured are complex, it is hard to attain the goal of fault diagnosis and isolation just use one method.
由于运八系列飞机上装备的机载设备种类比较多，测试信号复杂，单纯使用一种故障诊断方法很难达到故障诊断与隔离的目的。
This paper investigates energy distribution of air-borne acoustic signals in time-frequency domain during aluminum alloys spot welding in order to identify weld nugget states.
研究了铝合金点焊过程中声音信号的时频域能量分布，并应用它来识别点焊的熔核状态。
The difficulty of coherent jamming against SAR, the characteristics of air-borne SAR and space-borne SAR are analyzed. The corresponding coherent jamming methods are provided.
分析了对合成孔径雷达相干干扰的难点以及星载、机载合成孔径雷达的特点，并提出了相应的相干干扰方法。
Experiment results indicate that air-borne acoustic signals contain information about weld nugget states and can be viewed as a kind of parameters that indicate the welding quality.
点焊过程中的声音信号包含着熔核形成信息，是点焊质量监控的重要参数。
To resolve the problem of low locating rate in fault diagnosis of air-borne radio equipment, the idea was proposed to using preceding fault information in the tests of batch equipments.
本文针对机载无线电设备故障诊断定位率低的问题，提出利用先验故障信息指导批次定检的思想。
But this year, there is an unusual air of expectancy amid the deepening chill - a mood borne by the prospect of windfall profits generated by the country's mining sector.
但是今年，在越来越恶劣的严寒天气之中，有着一种不同寻常的期待气氛——对该国采矿业暴利的预期产生了这种情绪。
It was a big job, most of which would be performed by our European Allies, even as America had borne the lions share of responsibility for the air war.
尽管美国在空袭中承担了最主要的责任，但这些工作中的大部分都需要我们的欧洲盟友们去做。
Our sector has good evidence about what droughts, floods, storms, heatwaves, air pollution, malnutrition, displaced populations, and water-borne and vector-borne diseases mean for health.
干旱、洪水、风暴、热浪、空气污染、营养不良、流离失所的人群以及水源性和媒介所致疾病对健康带来何种影响，我们卫生部门掌握了足够的证据。
Article 4 the expenses for civil air defense shall be jointly borne by the State and the society.
第四条人民防空经费由国家和社会共同负担。
This paper describes the simulation system for debugging and testing of air borne radar application software.
描述供机载雷达应用软件调试、测试用的软件仿真系统。
In the "age of yuan, the yuan, at the time of yuan" of the "three yuan" moment, some places still base "very hot" in the courtyard, as a prosperous air borne, is thriving.
在这“岁之元、月之元、时之元”的“三元”时刻，有的地方还在庭院里垒“旺火”，以示旺气通天，兴隆繁盛。
The trap based filter radiometer is a key unit of new optical radiometric standard detectors, and has potential applications in radiometric calibration of field, air borne and space borne sensors.
基于滤光片辐射计的新型光辐射标准探测器在野外、机载和星上高精度辐射定标中具有广阔的应用前景。
This method are with a high accuracy and real time application, and can be applied in the calculation of allowable launching area of air to air missile in air borne fire control system.
提出了一种确定目标进入角的原理和方法，这种原理和方法具有较高的计算精度和实时性，易于工程实现，可用于机载火力控制系统完成空对空导弹允许发射区计算。
The air borne microbial particles precipitation from some sites over the urban district in Baoji City was monitored by using the technique of gravity plate.
选取宝鸡市城区测点用平皿沉降法测量了空气微生物粒子沉降量。
The air borne microbial particles precipitation from some sites over the urban district in Baoji City was monitored by using the technique of gravity plate.
选取宝鸡市城区测点用平皿沉降法测量了空气微生物粒子沉降量。
应用推荐