英语语法分析

On steering wheel, on gauge board, but also moistens has boy's bloodstain.

在方向盘上，在测量仪板，沾有男孩的血迹。

So forensic scientists could use a bloodstain to narrow a victim’s age to within two decades.

这样，法医可以利用血迹是受害者的年龄范围缩小到20年以内。

Legal medical expert still found a bloodstain of the murdered in his clothes although the suspect had washed.

嫌疑犯洗过他的衣服，可法医专家仍然在衣服上找到了一处被害人的血迹。