Much can be learned about flying in an attempt to imitate the bird, but also when differentiating from its exact behavior or appearance.
通过模仿鸟的飞行可以学到很多飞行方面的技术，但无法学到其精确的分辨能力。
The caged bird flapped its wings in a vain attempt to fly away.
笼子哩的鸟拍打着翅膀想飞走，但却徒劳无功。
The caged bird flapped its wings in a vain attempt to fly away.
笼子哩的鸟拍打着翅膀想飞走，但却徒劳无功。
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