骨髓

例句：

1. 1. The patient's bone marrow was tested for cancermarkers.
   病人的骨髓被用来检测癌症标志物。
2. 2. The scientist discovered a new typeof bone marrow that could help treat leukemia.
   科学家发现了一种新的骨髓，可以治疗白血病。
3. 3. The doctor advised the patient totake bone marrow supplements to boost his immunesystem.
   医生建议病人服用骨髓补充剂来增强免疫系统。