骨髓是一种红色、海绵状的东东，居住在很多大骨头的腔隙（骨髓腔）里；它需要铁元素、维生素B 12 、叶酸等原料来制造血红蛋白和红细胞。
To produce hemoglobin and red blood cells, your body needs iron, vitamin B-12, folate and other nutrients from the foods you eat.
如果那些东东在美国制造，我买的时候多掏几个钱也行啊。
I'm all for paying more for goods if they are made in the US.
塑料能用来制造各种各样的东东。
塑料能用来制造各种各样的东东。
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