Red bone marrow is where red and white blood cells are made and yellow bone marrow is mostly made of fat.

红骨髓是制造红细胞和白细胞的地方，而黄骨髓主要由脂肪构成。

And yellow marrow stores energy as fat — if you happen to be a predatory animal, yellow bone marrow can be one of the best sources of calories you can find.

黄骨髓以脂肪的形式储存能量——如果你碰巧是食肉动物，黄骨髓可能是你能找到的卡路里的最佳来源之一。