有时候罪犯会留下明显的痕迹，简直是笨得可以。
Sometimes the culprit will have left obvious tracks and his work will be downright clumsy.
口腔周围明显的痕迹是由充满死者口腔的金属或汞合金导致的干扰线。
The apparent marks around the mouth are interference lines caused by metal or amalgam fillings in the dead man's mouth.
这是在那个时期中最伟大的丰碑之一，造船的材料是用橡树的主干，并用石斧劈制而成（在船底部有明显的痕迹）。
This is one of the greatest monuments of this period. The boat is made from a single trunk of oak with the help of stone axes (their traces are well seen on its bottom).
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