indentation
/ˌɪndenˈteɪʃn; ˌɪndɛn`teʃən/ n
1 [U] indenting (indent 1, 2) or being indented 作凹坑或锯齿状; 缩进排印或书写.
2 [C]
(a) ~ (in sth) mark made by indenting 凹陷; 凹坑; 缺口
the deep indentations of the Norwegian coastline 挪威海岸线的犬牙交错状.
(b) space left at the beginning of a line of print or writing （排印或书写的）行首空格.