DeLaurier’s goal is more modest than the delicately controlled flight of birds: he just wants to get off the around. But that still means a relatively complicated mechanical arrangement. Moreover the mechanical stresses are much greater on a flapping wing than on a fixed wing. This combination is what broke the early ornithopters. Fortunately, DeLaurier’s wings are made from modern materials: a combination of Kevlar, carbon fibre and epoxy resin. DeLaurier’s ornithopter has a wing in three sections. The centre section is connected to the engine and pumps up and down. On each side of this are the flapping wing sections, attached with hinges. The wings pivot on the ends of two vertical struts that are fixed about a metre or so out from the side of the fuselage. The result is that when the centre panel is pushed up the two wing sections flap down, and vice versa. The wings are also designed to twist in order to prevent a phenomenon called flow separation which can cause a plane’s engines to stall. If all this works, and they actually get the ornithopter in the air, they’ll have to control it. Unlike fixed-wing aeroplanes, which use flaps on the wings called ailerons to make the plane turn, the ornithopter has no ailerons and relies on a rudder to turn.
📝 题目要求
找出文本中的逻辑关系词,并写出对应的逻辑类型
找出文本中的逻辑关系词；并写出所对应的逻辑类型：
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✅ 参考答案与解析
But：转折 Moreover：递进 The result is that：因果 also：递进 in order to：目的 Unlike：对比 But：转折（表示尽管目标适度，但机械安排仍然复杂） Moreover：递进（进一步说明扑翼比固定翼承受的机械压力更大） The result is that：因果（表示前文描述的翅膀结构导致的结果） also：并列（添加另一个设计特征） in order to：目的（表示翅膀扭曲的目的） Unlike：对比（对比固定翼飞机和扑翼飞机的控制方式）