An internal head injury is usually more serious because the skull serves as the protective helmet for the delicate brain.
而闭合性损伤通常是更严重的，因为颅骨就像一个头盔一样，保护着我们精密的大脑。
An internal head injury is usually more serious because the skull serves as the protective helmet for the delicate brain.
而闭合性损伤通常是更严重的，因为颅骨就像一个头盔一样，保护着我们精密的大脑。
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