求翻译：多数鸟具有大约175块不同的肌肉，主要控制翼、皮肤和腿。鸟身上的最大的肌肉是胸肌，或叫做胸膛肌肉，它控制翼并且构成一只飞鸟身体重量的15-25%。它提供对于飞行必不可少的强大的翼冲程。是什么意思？

Most birds have about 175 different muscles, the main control wing, the skin and legs. Birds, the largest muscle is the chest, or called the chest muscles, which control the composition of a bird wing and body weight of 15-25%. It provides a powerful essential for flying wing stroke.

Most birds are about 175 different muscle, the main control wings, skin and legs. The bird was found on the largest muscle in my chest, or chest muscles, and it is called control-wing and constitute a body weight of birds only 15 - 25 per cent. It provides essential for flights of powerful wings str

The most birds have about 175 different muscles, primary control wing, skin and leg.On the bird body biggest muscle is the musculus pectoralis, and or the named chest muscle, it controls the wing to constitute a bird body weight 15-25%.It provides regarding flies the essential formidable wing stroke

Most birds have approximately 175 different muscles, main control wings, legs and skin. Birds is the maximum muscle chest muscle, or called the chest muscles, it poses a bird control wing and body weight of 15-25%. It provides the powerful wing stroke essential for flight.

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