痕跡的英文：
a vestige; a mark; traces; an imprint; a sign

vestige是什么意思：
n. 遗迹,痕迹,残余,丝毫,退化的器官

A human being has the vestige of a tail.
人类仍有尾巴退化的痕迹。

He has not a vestige of evidence for this assertion.
他没有丝毫证据证明这个论断。

Modern authoritarianism is a vestige of traditional personal rule
现代独裁主义则是传统的个人统治的残余。

mark是什么意思：
n. 符号；记号；分数，成绩；污点；迹象
v. 做记号；做标记；表明方位；标志；庆祝

Marking: Every package shall be marked with “SM” in diamond and marked the package number.
麦头每件包装应刷上菱形图案内有二字,并应刷上件号

impress a mark on [ upon ] a surface=impress a surface with a mark
在表面上打记号

To mark or mottle with spots.
有斑点，成斑驳用点作标记或使斑驳杂色

traces是什么意思：
n. 痕迹；踪迹；微量；迹线
v. 追溯；回溯；跟踪，追踪；描绘；探索；沿路走

trace contaminant
残余污染物

They are trying to trace the source of the trouble.
他们正设法找出这件麻烦事的起因。

They disappeared without leaving a trace.
他们不见了，没有留下一点痕迹。