rocket X-ray astronomy

例句：

1. 1. X-rays are used to detect bone fractures in the body.
   X射线用于检测身体内的骨折。
2. 2. The doctor uses an X-ray machine to take pictures of the patient's bones.
   医生使用X光机拍摄病人的骨骼照片。
3. 3. X-rays can reveal the internal structure of a human body.
   X射线可以揭示人体内部结构。