Make the following sentences:
However, one needs training to appreciate the beauty contained in mathematics, physics, chess, the structure of trees, the structure of bird wings or the trembling caused by gas passing through the flute hole.
2. Even in the most complicated and worst wind conditions, the eagle can actively and passively adjust its wings to keep its direction stable and its line of sight fixed.
3. Based on the original uniform rigid model, a flexible flapping wing model is proposed, which takes into account the changes of flapping speed and shape of flapping wings and makes it closer to the real flapping situation of bird wings.
Xinghai is formed by wild debris, and there are many survivors and monsters in it, such as singing snakes with wings, snakes with wings of human face and birds, Tiger Claw with human face and Tiger Claw with tiger teeth under his arm.
Heifeng Village is hundreds of miles away from Gumu Village. It is a group of small mountain thieves within the scope of Xinyi City. As small as Sinuiju, they are reluctant to send troops to eliminate evil. Of course, apart from kidnapping and extorting some money, they have no great evil, which is also one of the important reasons.
6. Semi-rigid articulated rotor, with five blades, the blades are made of carbon fiber wound beams and honeycomb composite sandwich structure skin, the leading edge is covered with titanium anticorrosive tape, the trailing edge is provided with metal tabs, and the blades are made of new airfoils, which can improve the lift of the tail blades.