It dated from the fifth century, and archeologists were able to find trace residues of chocolate inside.

它的年代可以追溯到公元5世纪，考古学家还能从它的内部找到巧克力的残余痕迹呢。

What's the researchers in the reading are identifying as blood vessels might just be traces soft and moist residues left by bacteria colonies.

在阅读部分，研究人员鉴定为血管的物质很可能就是细菌繁殖后留下的湿软残渣的痕迹。