indentation
noun uk/ˌɪn.denˈteɪ.ʃən/ us/ˌɪn.denˈteɪ.ʃən/
(HOLE)
[ C ]物体表面的洞（或记号）
a hole or mark on the surface of something
The heels of her shoes had left indentations in the mud. 她的鞋跟把泥地踩得坑坑洼洼。
(SPACE)
[ C or U ]（书写时的）缩排，行首空格;使用行首空格
a space left at the edge of a line of writing, or the process of leaving such a space