narrow feathers and weak flight muscles suggest it was not a powerful flier.
狭窄的羽毛和柔软无力的飞翔肌暗示孔子鸟并非是个高超的飞行大师。
If so, breakdown of their flight muscles may prevent them reaching their destiny.
即使如此，飞翔肌肉的衰竭，可防止它们再次迁飞。
If so, breakdown of their flight muscles may prevent them reaching their destiny.
即使如此，飞翔肌肉的衰竭，可防止它们再次迁飞。
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