以下为句子列表：
英文: It is concluded that all of the tested bionic wings can generate lift force, however the flexible wing has best kinetic and aerodynamic performance among them, as well as flapping frequency and amplitude are the main factor of effecting on lift force gene
中文: 实验结果表明，研制的翅型都能产生一定的升力，其中柔性翅具有较好的运动性能和气动性能，并且拍动频率和拍动幅度对升力有较大影响。
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英文: Meanwhile it retains evenness on lift force to prevent leakage of residue that is caused by installation clearance error or changes in welding criteria, flow off molten iron as well as break-over welding ,so that the ideal fosion depth and finishment have
中文: 在需原动力的条件下，该机利用弹性夹角变化，随着筒体转动，使垫层焊剂始终紧贴筒体外侧环向焊接区，并保持托力均匀防止因装配间隙误差或焊接规范变化而引起漏渣，铁水下淌及焊穿现象，达到理想的熔深度和光洁度。
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英文: Modern aircraft are so heavy that the wings must develop a very large lift force in order to sustain the aircraft.
中文: 现代飞机重量很大，机翼必须产生巨大的升力才能使飞机升入空中。
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英文: The two wall jets collide with each other and turn upward to form an upwash fountain which increases the lift force of the upper plate.
中文: 包围在喷射流与喷泉流附近的流体会被其带入而在周围形成数个涡流。
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