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它们有一条推进用的尾巴，咽及鳃裂。IV. They present a propulsive tail, pharynx and branchial openings.

航空部对喷气推进的兴趣正在增加。Interest in jet propulsive force was now growing at the Air Ministry.

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文章对船舶推进轴系冲击特性进行试验研究。This paper studies on shock experiment for marine propulsive shafting.

这架飞机有更大的推进功率比的发动机驱动的飞机。The jet plane has a greater propulsive power than the engine-driven plane.

这与莫顿层层推进的爵士乐的基本要义毫无艺术上的匹配之处。It is no match artistically for Morton's propulsive meat-and-potatoes jazz.

需要注意的是在这个姿态每个冠军都是在用推进力。It should be noted at that position each champion is applying propulsive force.

他们不同的推进效率和速度与他们的生活习性有关。And the propulsive efficiency and swimming speed are related to their living habit.

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槟榔对小鼠胃肠推进运动有显著加强作用。Areca catechu L. increased markedly the propulsive movement of gastrointestinal tract in mice.

这个推进阶段的后面部分依靠在停止内收同时的肘关节伸展上。The latter part of this propulsive phase employs rapid extension at the elbow while adduction ceases.

左腿开始打水平衡右臂最后的强劲推力及出水。The left leg begins to kick to counter-balance the final propulsive surge and extraction of the right arm.

文中亦对特殊船尾的推进性能与螺旋桨设计作了初步分析。The propulsive performance and design of propeller for the special stern shapes are discussed in this paper.

大口径长距离顶管施工顶进推力过大是困扰顶管施工多年的技术难题。The construction of Pipe Jacking is beset with difficulty due to the large propulsive force for several years.

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某舰船直流电站由双绕组发电机、双绕组直流配电板、推进电机组成。The marine DC power station includes double-winding generation, DC distributing board and DC propulsive motor.

表达深潜艇推进电机负载的静、动态特性成为可能。Therefore, it becomes practical to express static and dynamic properties of shift load of the DSV propulsive motor.

就单个城镇而言，民族文化、民族宗教与民族贸易的亲合关系和响应力，是城镇成长的主要推进剂。As individual urban, national culture, national religion and national trade, are the main propulsive force of urban.

这两类发动机都是靠高速向后喷射气流所得到的反作用力而发出推力的。In both, propulsive force is derived from the reaction produced by a stream of air driven rearwards at high velocity.

为使运动员在训练和比赛中有良好技术表现，对游泳推进力和动态阻力的测量进行了研究。The propulsive force and the active drag during swimming were measured experimentally to improve athletic performance.

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推进式EDT因此可以做为太空拖曳船，将位在LEO的酬载移到较高的轨道或抑制轨道逐渐降低。Propulsive EDTs could thus serve as space tugs to move payloads in LEO to a higher orbit or to counteract orbital decay.

因此，提高技术效率带来的直接作用是使运动员前进阻力减小，推进力增大。Improving the efficiency of swimming technique will help our athletes to reduce resistance and increase propulsive force.

超燃冲压发动机是高超声速飞行器理想的动力装置，是当前高超声速技术领域的研究热点。Scramjet is the perfect propulsive device to hypersonic vehicle, and is a hot issue in current hypersonic technology area.