| 1. | Jet planes have displaced propeller ones
喷气式飞机取代了螺旋桨飞机。 |
| 2. | These are best employed from rotary - wing aircraft , but still pack a punch when employed from fixed - wing craft
最适用于水平螺旋桨飞机，也是固定翼飞机的杀伤利器。 |
| 3. | Compared with jet planes and propeller - driven aircrafts , the radar echoes of helicopters have different characteristics
与喷气式飞机和螺旋桨飞机相比，直升机的雷达回波具有不同的特点。 |
| 4. | The saab airborne surveillance system includes saab 2000 turboprop aircraft equipped with saab microwave systems airborne radar system erieye and associated support equipment
萨博空中监视系统包括了萨博2000涡轮螺旋桨飞机及相关支援设备，萨博2000飞机装配了微波系统的erieye空中雷达系统。 |
| 5. | She and other engineers are toying with lighter materials and some are pondering ideas as radical as returning to propeller - driven planes as an eco - friendly alternative to passenger jets
她和一些工程师们正打算使用一些更轻巧的材料，另一些工程师们则考虑重新启用螺旋桨飞机，用作生态环保的客机。 |
| 6. | I found that my trousers was sweat pickled after one week wearing . it ' s not a comfortable job to fly single prop airplane on such hot days in july
穿了一个星期的制服裤子，突然有一天发现汗渍已经留下了很明显的痕迹。在七月流火的日子里，出了多少汗已经记不得了，飞没有空调的单发螺旋桨飞机不是件容易的事情哦！ |
| 7. | According to the requirements of propeller aerocraft model test in wind tunnel , specifications of the driven motor is presented by aerodynamic analysis , and a short - term operated high power density three - phase induction motor is developed with reasonably designing the motor , such as electromagnetism load , heat checkout and high - efficiency heat exchanger
摘要针对螺旋桨飞机模型带动力风洞实验要求，通过气动性能分析提出驱动电机的技术指标，在满足结构约束的条件下，通过合理设计电机的电磁负荷、校核发热、采用高效冷却装置等，研制出短时工作制高功率密度三相异步电机。 |
| 8. | This dissertation makes detailed research on the characteristics of high resolution range profiles ( hrrps ) . according to the scattering center model theory , the aspect sensitivity of hrrps , its relationship with other factors and its evaluation methods are analyzed in detail . a method to improve aspect stability of hrrps is proposed
本文详细研究了高分辨距离像的特性，基于目标散射点模型，分析了一维距离像的方向敏感性，以及它与各种因素的关系和它的度量方法，并提出了提高其方向稳定性的方法；同时，专门讨论了螺旋桨飞机的一些特性。 |
