Bone marrow is hematopoietic tissue.是什么意思？

Bone marrow is hematopoietic tissue.

骨髓是生血组织.

bone

n. 骨头，尸骨，骨质物，有…样的骨头的；vt. 挑鱼刺，剔骨头，剔去…的骨；vi. 苦学，专心致志；

例句
...a small, expensive pocketknife with a bone handle.
昂贵的骨柄小折刀

marrow

n. 骨髓，脊髓，滋养品，〈英〉食用葫芦；

例句
Some films chill you to the marrow of your bones.
有些电影让人毛骨悚然。

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

hematopoietic

adj. 造血的，生血的；

例句
Objective To study the therapeutic effectiveness and associated complications of unrelated allogeneic hematopoietic stem cell transplantation ( URD - SCT ).
目的探讨非血缘关系异基因造血干细胞移植 ( URD-SCT ) 的疗效和相关并发症.

tissue

n. 薄纸，棉纸，[生]组织，一套；

例句
Before applying make-up, blot the face with a tissue to remove any excess oils...
上妆前，先用面巾纸把脸上多余的油吸干。