Early jet engines had narrow inlets and were very noisy, but as the diameter of the fans at the front increased, the engines became quieter.
早期的喷气式发动机进气口狭窄且噪音巨大但是随着前部风扇直径的增大发动机变得越来越安静。
The new trainers will prepare fast jet aircrew for flying front-line aircraft with a modern cockpit environment of digital displays sophisticated navigation and advanced avionics.
新的教练机将为前线飞行飞机配备快速喷气飞机空勤人员，以及数字显示的精密导航和先进航空电子设备的现代驾驶舱环境。
Whereas jet engines were long and slim in the 1960s, today they have a vast opening at the front containing a giant fan.
60年代的喷气式飞机引擎又长又细，而今天它们的前端有了一个硕大的开口，巨大的风扇包含其中。
To underline the point, he made his announcement in front of a fighter jet that flies on a mixture of biofuels.
为了强调这一点，他在使用混合生物燃料的战斗机前宣布了该计划。
It is concluded that cross jet can achieve a good condition of heat and mass transfer for the combustion of pulverized coal in front of a tuyere.
这表明交叉射流为煤粉在风口前的燃烧提供了良好的传热和传质条件。
When a jet engine is running, a fan at the front draws in air, which is then compressed and burned with fuel to produce hot, rapidly expanding gases which roar out of the back.
喷气发动机运转时，前端的风扇吸入空气； 空气经过压缩后与燃油一道被点燃；高温的燃气迅速膨胀，咆哮着冲出尾喷管。
It features a spade motif in Jet on Crystal silver Shade Mesh on the front with silver calfskin on the back.
作品正面以缀有黑色水晶的黑桃图案搭配银色魅影网布，而背面则饰以银色小牛皮。
The results show that there is a good consistency between the low -frequency variations of the westerly jet (and its relevant front zone) over the Northern China and Australian summer monsoon.
结果表明，我国北部上空的西风急流（及相应的锋区）与澳大利亚的夏季风的低频变化有很好的一致性。
A saddle point and horse shoe vortex were formed in the front of the hole because of the rigid body character of coolant jet near the hole.
射流在出口附近具有刚体的特性，并在射流前方形成了鞍点及马蹄涡。
Moreover, it is found that Siberia High, East Asian Trough, Polar Front Jet and the location of Polar Vortices are notable different, causing winter temperature anomalies in DaLian.
其中西伯利亚高压、极涡的位置、东亚大槽的强弱、极锋急流都差异显著，从而导致大连地区冬季气温的异常。
Ahead of the warm front, the bands are broadly parallel to the airflow in the rising section of the conveyor belt, whereas in the warn sector they parallel the cold front and the low-level jet.
在暖锋前，这条带状区域横向平行于传送带上升区中的气流，然而，在暖区中，则平行于冷锋和低空急流。
When a jet is running, a compressor at the front draws in air and compresses it (see illustration).
当喷气式飞机飞行时，前部的压缩机纳入空气并将其压缩(见插图)。
Vacuum is generated by application of air jetting effect to allow the moisture absorbing to soft foams and discharged along with the jet in front of the pipeline cleaner.
利用干空气射流作用产生真空，使水分吸附至软体泡沫中，并随着射流排到清管器前端。
When the baroclinicity of southwest vortex had not been built and where cold front existed, the rain belt may lie in anywhere of the left of southwest low level jet.
在西南涡斜压性未建立之前以及冷锋附近，暴雨区可位于低层西南风急流左侧的任何位置。
With smoothed particle hydrodynamics, we calculate the formation of micro-jet from the groove of metal surface, and reveal the dependence on the width of loading wave front.
利用光滑粒子流体动力学方法，计算了金属表面沟槽在冲击下的微射流现象，详细讨论了微射流对加载波前沿宽度的依赖性。
With smoothed particle hydrodynamics, we calculate the formation of micro-jet from the groove of metal surface, and reveal the dependence on the width of loading wave front.
利用光滑粒子流体动力学方法，计算了金属表面沟槽在冲击下的微射流现象，详细讨论了微射流对加载波前沿宽度的依赖性。
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