这些鸟类表现出了不仅能使用工具，并且能自己制造工具的能力，它们将一段段导线扭转弯曲并伸到它们够不到的地方以获取食物。
These birds have been shown to not just use tools, but to make their own by twisting and bending pieces of wire to fish food from places they couldn't reach otherwise.
分析在弯曲工况、制动工况、转弯工况和扭转工况下的应力与变形状态，对应力集中位置结构提出改进方案。
Do research on the stress and deformation state in the condition of bending, braking, turning and reversing, and then make a program that improves the structure of the frame.
根据应力场强法，分析了旋转弯曲疲劳极限与扭转疲劳极限之间的关系。
Through the stress field intensity approach, the relationship between the rotary bending fatigue limit and torsion fatigue limit was studied.
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