The reduced density of the bird skeleton provided a light but strong frame.
减轻了的骨架密度则提供了轻巧而坚固的身体框架。
A clear majority of bus body skeleton, and the car body and truck cab frame is not obvious.
客车车身多数具有明显的骨架，而轿车车身和货车驾驶室则没有明显的骨架。
A clear majority of bus body skeleton, and the car body and truck cab frame is not obvious.
客车车身多数具有明显的骨架，而轿车车身和货车驾驶室则没有明显的骨架。
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