①An indentation is the space at the beginning of a line of writing when it starts further away from the edge of the paper than all the other lines.【n.行首缩格,行首留空格】
②An indentation is a shallow hole or cut in the surface or edge of something.【n.凹口;缺口】
①Using a knife, make slight indentations around the edges of the pastry.
②They pressed hard enough to make indentations .
《科学美国人》一篇题为 Snake eyes 的文章也出现了这个表达：
Taylor Swift的歌 dress 也出现了这个表达：
twiddle one's thumbs
If you say that someone is twiddling their thumbs, you mean that they do not have anything to do and are waiting for something to happen.
①The prospect of waiting around just twiddling his thumbs was appalling.
②The Government cannot expect graduates to twiddle their thumbs on the dole.
《新闻周刊》一篇题为 Putting down roots 的文章也出现了这个表达：
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