Moreover, the spheres had dark red centers (substances with iron tend to be reddish in color) and were also about the size of red blood cells.

而且，这些球状体中间呈红色，而含有铁元素的物质往往是红色的，同时这些球状体的大小也符合血红细胞。

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Moreover, the spheres had dark red centers (substances with iron tend to be reddish in color) and were also about the size of red blood cells.

而且，这些球状体中间呈红色，而含有铁元素的物质往往是红色的，同时这些球状体的大小也符合血红细胞。

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