A thumbprint is a mark made by a person's thumb which shows the pattern of lines on its surface.
N-COUNT
痕迹
If you say that something such as a project has someone's thumbprint on it, you mean that it has features that make it obvious that they have been involved with it.
例句
It's got your thumbprint all over it...到处都有你参与其中的痕迹。His personal goal was to put 'his thumb print' on a program of changes.他的个人目标是将改革方案打上“自己的印记”。
英英词典释义
Noun
1. fingerprint made by the thumb (especially by the pad of the thumb)