Police found traces of blood on the car seats.
警方发现了微量的血在汽车座椅。
What the researchers in the reading are identifying as blood vessels might just be traces of soft and moist residue 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。
Traces of blood on the knife matched the suspects blood-type.
刀刃上面的血迹与嫌疑犯的血型基本是一致的。
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